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		<updated>2026-04-16T18:30:42Z</updated>
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	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=3082:_Chess_Position&amp;diff=375711</id>
		<title>3082: Chess Position</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=3082:_Chess_Position&amp;diff=375711"/>
				<updated>2025-04-29T21:04:42Z</updated>
		
		<summary type="html">&lt;p&gt;162.158.91.125: Undo revision 375710 by 172.70.83.182 (talk)&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 3082&lt;br /&gt;
| date      = April 28, 2025&lt;br /&gt;
| title     = title&lt;br /&gt;
| image     = image&lt;br /&gt;
| imagesize = 740x598px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = It's important to learn the moves that take you into the vortex, but it's best not to study vortex itself too closely. Even grandmasters who have built up a tolerance lose the ability to play for a few hours after studying it.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
{{incomplete|The various paragraphs are not organised and information about the same joke is spread across the explanation. Make the explanation more cohesive. Also, might need to reduce the focus on describing the scene and focus more on explaining the jokes.}}&lt;br /&gt;
&lt;br /&gt;
[[Cueball]], a newer chess player, talks to [[Pornytail]], presumably a more experienced player, about a chess game he had last week against [[Knit Cap]]. After Cueball made a {{w|blunder (chess)|blunder}}, a critically bad mistake which frequently changes the course of the game, both of them quickly made inaccurate moves, probably rated as a &amp;quot;{{w|Blunder (chess)|blunder}}&amp;quot;, &amp;quot;mistake&amp;quot;, or &amp;quot;miss&amp;quot;, leading to an odd configuration of the chess pieces. Blunders that are not taken advantage of can lead to this effect for less experienced players. &lt;br /&gt;
&lt;br /&gt;
The rest of this comic becomes absurd, as Cueball then describes himself and Knit Cap descending into a fantasy world &amp;quot;on a deep branch of the game tree.&amp;quot; Chess strategy is commonly described in terms of following a {{w|decision tree}} or {{w|game tree}}, as one usually needs to calculate multiple moves ahead when planning out what move to play. As a chess game progresses, the {{w|phase space}} of possible positions increases wildly, though this will include many more configurations than are typically seen or anticipated by players. Rarely, an expert player may 'discover' a truly clever {{w|Glossary of chess#theoretical novelty|novel opening}}, but centuries of recorded gameplay has explored many of the possible moves, both good and not so good, that are often recognized by experienced students of the game as common stepping-stones on the way to possible victory (or frequent traps that send the unwary down the road to defeat). Both precise game-board states and more general variations may be easily recognized by an experienced player, and even be {{w|Checkmate pattern|given a name}} by the player community as a whole.&lt;br /&gt;
&lt;br /&gt;
However, it seems that Cueball and Knit Cap each made a sequence of seemingly obvious 'blunders' that neither opponent then took advantage of, reaching a board configuration that Cueball had never even anticipated happening. In some apparently mystical (or at least psychological) manner, by travelling such an unlikely and unfamiliar branch of the player/board game-space, the precise positioning of pieces combined with the state of mind that Cueball had developed created the impression of literally entering a mythical garden, with time even stopping.  In chess, you want pieces to be in a position to attack other pieces while at the same time being protected by other pieces, and typically you'd have some pieces on the offense and some playing defense and some doing both. It seems that in this board configuration, somehow all the pieces ended up both in offensive attack positions able to attack every other piece on the board while at the same time each one was being protected by against attack by their other pieces. It was this perfect balance of position and protection that led to the time distortion and the magical garden.&lt;br /&gt;
&lt;br /&gt;
Pornytail reacts nonchalantly to this story, as she says this is a common scenario for new players, and that there even is a defined name for it: the Kasparov Vortex Gambit.  {{w|Garry Kasparov}} and {{w|Anatoly Karpov}} are both Russian chess grandmasters and former world champions. Russian grandmaster {{w|Garry Kasparov}} was the number-one rated chess player from 1984 to 2005, and is considered one of the greatest chess players of all past time, if not ''the'' greatest. A {{w|gambit (chess)|gambit}} refers to a chess opening in which a player sacrifices material with the aim of achieving a subsequent positional advantage. This name seems to indicate that Kasparov himself either discovered/’invented’ or made popular this &amp;quot;gambit&amp;quot; to suck new players into a &amp;quot;vortex&amp;quot; and trap them from getting out. This is not the case, but, within the xkcd universe, he has performed an equally absurd gambit (also named after himself) in [[2936: Exponential Growth]].&lt;br /&gt;
&lt;br /&gt;
Pornytail's advice to Cueball after he &amp;quot;recovers&amp;quot; from the disillusionment of the &amp;quot;vortex&amp;quot; is that she can teach him how to defend against the attack, by using the &amp;quot;f pawn&amp;quot;. The f-pawn is the pawn that begins on the &amp;quot;f-file&amp;quot; (the 6th vertical column of the chessboard from white's perspective). The pawn would start either on f2 (sixth column, second row) for the white player or f7 (sixth column, seventh row) for black. The fact that an apparent distortion in the fabric of space can be countered with ''a single pawn'' just adds to the absurdity of the situation. Equally absurd is the fact that moving the f rank pawn in early game, due to its starting position relative to the starting position of the king, is itself usually a blunder that exposes the king to a diagonal attack.&lt;br /&gt;
&lt;br /&gt;
In the title text, Pornytail continues with her advice, telling Cueball that he needs to understand how the vortex can be entered, but not to study the actual vortex. It appears that if you spend too much time in the vortex focusing on it, you will [[356: Nerd Sniping|lose your ability]] to play chess. Even experienced players such as grandmasters who have build up some kind of tolerance against the effect of the vortex, lose their chess abilities for a few hours after studying the vortex. Thus being able to get your opponent into the vortex, without getting caught in it yourself, should win you the game, since they would lose their ability to play chess.&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
:[In the first panel, Cueball is walking in from the left, while talking to Pornytail.]&lt;br /&gt;
:Cueball: Something odd happened to me last week in a game at the chess club.&lt;br /&gt;
&lt;br /&gt;
:[Cueball is playing a game of chess against Knit Cap.]&lt;br /&gt;
:[Caption above frame:]&lt;br /&gt;
:I moved, then instantly realized I'd blundered. But my opponent didn't notice and made a weird move.&lt;br /&gt;
:I got rattled and moved almost randomly, then I think we both panicked and made a couple of nonsensical moves, rapid-fire.&lt;br /&gt;
&lt;br /&gt;
:[Zoomed in on Cueball, with three question marks above his head]&lt;br /&gt;
:I don't know how it happened, but suddenly I realized I was staring at an indescribably strange board position.&lt;br /&gt;
&lt;br /&gt;
:[Cueball is talking to Pornytail.]&lt;br /&gt;
:Cueball: I've never seen anything like it. It seemed like every move attacked every piece, yet every piece was also protected. Pieces refracted through crystalline pawn structures.&lt;br /&gt;
:Cueball: The game clock slowed and then stopped.&lt;br /&gt;
&lt;br /&gt;
:[Cueball and Knit Cap are floating in a complex five-fold symmetrical plant-like pattern of &amp;quot;game tree branches&amp;quot;.]&lt;br /&gt;
:[Caption above the frame]&lt;br /&gt;
:It didn't even feel like we were playing chess. We had stumbled into a magical garden tucked away on a deep branch of the game tree.&lt;br /&gt;
&lt;br /&gt;
:[Cueball is talking to Pornytail.]&lt;br /&gt;
:Cueball: I don't remember how the game ended, if it did. &lt;br /&gt;
:Cueball: I don't remember how I got home. &lt;br /&gt;
:Cueball: It's all a blur.&lt;br /&gt;
&lt;br /&gt;
:[Close-up of Cueball's head.]&lt;br /&gt;
:Cueball: I've spent all week trying to reconstruct the position and can't.&lt;br /&gt;
:Cueball: It's consuming me.&lt;br /&gt;
:Cueball: I don't want to play chess. I just want to return to that garden.&lt;br /&gt;
:Cueball: Does... any of this make sense to you?&lt;br /&gt;
&lt;br /&gt;
:[Cueball is standing with hands on face surprised as Pornytail talks with him.]&lt;br /&gt;
:Pornytail: Yeah, that's the Kasparov Vortex Gambit. Common trap for new players.&lt;br /&gt;
:Cueball: ''What?!''&lt;br /&gt;
:Pornytail: Once you recover I'll show you how to block it with the f pawn.&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;br /&gt;
&lt;br /&gt;
[[Category:Comics featuring Cueball]]&lt;br /&gt;
[[Category:Comics featuring Pornytail]]&lt;br /&gt;
[[Category:Comics featuring Knit Cap]]&lt;br /&gt;
[[Category:Chess]]&lt;/div&gt;</summary>
		<author><name>162.158.91.125</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=2297:_Use_or_Discard_By&amp;diff=191324</id>
		<title>2297: Use or Discard By</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=2297:_Use_or_Discard_By&amp;diff=191324"/>
				<updated>2020-04-28T08:43:51Z</updated>
		
		<summary type="html">&lt;p&gt;162.158.91.125: /* Explanation */ &amp;quot;Things of bear spray&amp;quot; is nonsensical. I have reworded this to be more liberal.&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 2297&lt;br /&gt;
| date      = April 22, 2020&lt;br /&gt;
| title     = Use or Discard By&lt;br /&gt;
| image     = use_or_discard_by.png&lt;br /&gt;
| titletext = One of the things of bear spray says that, and I'm not one to disobey safety instructions, but there are no bears around here. Guess it's time for a camping trip where we leave lots of food out!&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
{{incomplete|Created by a BOT WITH A USE BY DATE. Please mention here why this explanation isn't complete. Do NOT delete this tag too soon.}}&lt;br /&gt;
&lt;br /&gt;
Many products carry a &amp;quot;Use By&amp;quot;, &amp;quot;{{w|Expiration date}}&amp;quot;, &amp;quot;Discard by&amp;quot; or similar date.  The date shows the latest date by which the product has been verified to provide its expected use. For example, a foodstuff will have a &amp;quot;consume by&amp;quot; date, showing the date after which the food may be unsuitable for eating.  For most products, this is a conservative estimate, especially if a product is kept sealed and stored in a cool, dark place. A few products become dangerous to use after that point, some simply become stale and less palatable (as in the case of foods) or lose potency. For most consumer items, there's no immediate imperative to discard a product as soon as it expires; you simply take the risk of a decline in quality or reliability. &lt;br /&gt;
&lt;br /&gt;
One of the issues around expiration dates is that the language used tends to be arbitrary and ambiguous. Some have explicit instructions to the consumer, such as &amp;quot;use by:&amp;quot;, others have instructions to the seller, such as &amp;quot;sell by:&amp;quot;, still others say things such as &amp;quot;best by:&amp;quot; or &amp;quot;freshest before:&amp;quot;. This can make it confusing how important it is to get rid of a given product on that date. &lt;br /&gt;
&lt;br /&gt;
In this comic, two similar emergency {{w|flare gun}}s, an item typically used to send out distress {{w|flare}}s, have slightly different expiry instructions. One has an instruction to &amp;quot;use by or discard by&amp;quot; a specific date (in this case, three days after the date of publishing).  The other has an instruction to &amp;quot;use by&amp;quot; this date. These two phrases almost certainly have the same intent. There would be no reason to actually fire the flare.  Even the instructions to discard the flare gun really just mean that the manufacturer cannot guarantee that it will work past the printed date, and so do not advise counting on it in an emergency situation.&lt;br /&gt;
&lt;br /&gt;
Despite this implication, [[Megan]] seems to take the latter instruction literally, as an order to actually fire the flare gun prior to the expiration date, whether or not it's necessary. It may be taken that she &amp;lt;em&amp;gt;wants&amp;lt;/em&amp;gt; the experience of firing a flare, and takes that instruction as an excuse to do so.  [[Cueball]] immediately objects to this line of reasoning. Firing a flare unnecessarily is generally a bad idea. It could summon emergency responders to a non-emergency situation, diverting emergency resources that may be needed elsewhere.  Even worse, if a flare is fired improperly, or in an unsafe direction, it could cause a fire and/or injuries, ironically creating an emergency situation, rather than signalling one. &lt;br /&gt;
&lt;br /&gt;
The title text similarly indicates that Megan intends to follow the same instructions with a can of {{w|bear spray}}.  Since there are no bears present, she will go camping and leave her food out to attract their attention, so that she may use the bear spray to repel bears before it &amp;quot;goes bad&amp;quot;.  This would involve approaching bears (close enough to spray them) and irritating them, potentially causing them to attack if the spray is ineffective or misapplied (perhaps it only works if they smell it, but Megan might spray another part of the bear), when it would be much safer to simply discard the bear spray and not get close to bears.&lt;br /&gt;
&lt;br /&gt;
The title text might be misspelled; it says &amp;quot;One of the things of bear spray says that&amp;quot;, which is not grammatically coherent. Randall might have meant to say &amp;quot;One of the tins of bear spray says that&amp;quot;, or it might be a relict of an earlier edit that could have been worded something like, &amp;quot;One of the things on a bear spray&amp;quot; or &amp;quot;One of the things a bear spray says&amp;quot;.&lt;br /&gt;
&lt;br /&gt;
Expiration dates (for food) have also been mentioned in [[737: Yogurt]], [[1109: Refrigerator]], and [[2178: Expiration Date High Score]].&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
{{incomplete transcript|Do NOT delete this tag too soon.}}&lt;br /&gt;
&lt;br /&gt;
:[Megan stands in the middle of the panel, holding two flare guns, one in each hand.]&lt;br /&gt;
:Megan: These emergency flare guns are about to expire.&lt;br /&gt;
:Cueball [off-panel]: I forgot we had those.&lt;br /&gt;
&lt;br /&gt;
:[Cueball sitting at a desk, working on a computer.]&lt;br /&gt;
:Megan [off-panel]: This one says &amp;quot;Use or discard by Apr 25 2020.&amp;quot;&lt;br /&gt;
:Cueball: Okay...&lt;br /&gt;
&lt;br /&gt;
:[Megan holds up one of the flare guns looking at it. She holds the other flare gun by her side.]&lt;br /&gt;
:Megan: But '''''this''''' one just says &amp;quot;Use by&amp;quot; ...&lt;br /&gt;
:Cueball [off-panel]: '''''No.'''''&lt;br /&gt;
&lt;br /&gt;
== Trivia ==&lt;br /&gt;
* Twenty-seven years ago exactly ([https://www.gocomics.com/calvinandhobbes/1993/04/22 April 22, 1993]), ''Calvin and Hobbes'' made a similar joke about expiration dates on milk.  Obviously the humor has a very long shelf-life.&lt;br /&gt;
* This comic shares some similarities with [[1821: Incinerator]], particularly in the last panel.&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;br /&gt;
[[Category:Comics featuring Cueball]]&lt;br /&gt;
[[Category:Comics featuring Megan]]&lt;/div&gt;</summary>
		<author><name>162.158.91.125</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=2131:_Emojidome&amp;diff=171983</id>
		<title>2131: Emojidome</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=2131:_Emojidome&amp;diff=171983"/>
				<updated>2019-04-02T03:10:13Z</updated>
		
		<summary type="html">&lt;p&gt;162.158.91.125: /* Explanation */ now has live updates&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 2131&lt;br /&gt;
| date      = April 1, 2019&lt;br /&gt;
| title     = Emojidome&lt;br /&gt;
| image     = emojidome.png&lt;br /&gt;
| titletext = 🤼🤼🤼🤼🤼🤼🤼🤼&lt;br /&gt;
}}&lt;br /&gt;
*To experience the interactivity, visit the {{xkcd|2131|original comic}}.&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
{{incomplete|Created by 😇. Needs more elaboration on font influencing emoji..}}&lt;br /&gt;
&lt;br /&gt;
This is the ninth [[:Category:April fools' comics|April fools' comic]] released by [[Randall]]. The previous fools comic was [[1975: Right Click]] from Sunday April 1, 2018.  &lt;br /&gt;
&lt;br /&gt;
The title is a reference to the movie ''{{w|Mad Max Beyond Thunderdome}},'' which had the tagline:  &amp;quot;Two men enter. One man leaves.&amp;quot; The &amp;quot;Thunderdome&amp;quot; in the film is a gladiatorial arena where conflicts are resolved by a duel to the death.&lt;br /&gt;
&lt;br /&gt;
In the interactive comic, which began at noon ET (16:00 UTC) on April 1, 2019, users are shown two emoji, and vote for their favorite. In the first round, the voting period for each bout lasted 37.5 seconds. The voting period for each bout doubled for the second, third, and fourth rounds. The voting period for each bout for the fifth round through the end was 26 minutes. The entire bracket is expected to take 24 hours 6 minutes.&lt;br /&gt;
&lt;br /&gt;
{| class=&amp;quot;wikitable&amp;quot;&lt;br /&gt;
|-&lt;br /&gt;
! Round !! Start (ET) !! Start (UTC) !! Bouts !! Bout length !! Round length&lt;br /&gt;
|-&lt;br /&gt;
| 1 || 12:00 || 16:00 || 256 || 37.5 s || 2 h 40 m&lt;br /&gt;
|-&lt;br /&gt;
| 2 || 14:40 || 18:40 || 128 || 1 m 15 s || 2 h 40 m&lt;br /&gt;
|-&lt;br /&gt;
| 3 || 17:20 || 21:20 || 64 || 2 m 30 s || 2 h 40 m&lt;br /&gt;
|-&lt;br /&gt;
| 4 || 20:00 || 0:00 || 32 || 5 m || 2 h 40 m&lt;br /&gt;
|-&lt;br /&gt;
| 5 || 22:40 || 2:40 || 16 || 26 m || 6 h 56 m&lt;br /&gt;
|-&lt;br /&gt;
| 6* || 5:36 || 9:36 || 8 || 26 m || 3 h 28 m&lt;br /&gt;
|-&lt;br /&gt;
| 7* || 9:04 || 13:04 || 4 || 26 m || 1 h 44 m&lt;br /&gt;
|-&lt;br /&gt;
| 8* || 10:48 || 14:48 || 2 || 26 m || 52 m&lt;br /&gt;
|-&lt;br /&gt;
| 9* || 11:40 || 15:40 || 1 || 26 m || 26 m&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
&amp;lt;nowiki&amp;gt;*&amp;lt;/nowiki&amp;gt; projected&lt;br /&gt;
&lt;br /&gt;
The competing candidates are periodically overlaid with heart emojis that float up from the vote button oscillating in a sinusoidal pattern before disappearing above the candidate, and may represent real-time votes for each emoji. Below, the results of past bouts are shown with the &amp;quot;loser&amp;quot; displayed in greyscale. Supposedly, the emoji will be eliminated one-by-one until there are a final two emoji facing off, with the one most voted-for being crowned the best emoji. This is likely a parody of March Madness.&lt;br /&gt;
&lt;br /&gt;
As confirmed by Randall in https://i.imgur.com/8kPwjou.png, the commentary is live. Randall seems to look at the IP's country of users live since &amp;quot;It seems like our friends over Australia is joining the fun&amp;quot; showed up on the commentary. &lt;br /&gt;
&lt;br /&gt;
Note that the schedule might show different emoji pictures than the main voting screen, presumably because of fonts. The image is pre-rendered.&lt;br /&gt;
&lt;br /&gt;
The competing candidates are chosen in order of unicode value at first, resulting in similar emojis being compared. Examples include:&lt;br /&gt;
&lt;br /&gt;
😜 squaring off against 😛 - two emoji playfully sticking their tongues out&lt;br /&gt;
&lt;br /&gt;
🤩 squaring off against 😍 - two smiling emojis with symbols for eyes&lt;br /&gt;
&lt;br /&gt;
😂 squaring off with 🤣 - two emojis that are crying in laughter/joy.&lt;br /&gt;
&lt;br /&gt;
The title text consists of the wrestlers emoji (🤼) eight times over. If it appears to be nonsense, then your browser may not be parsing the title text correctly.&lt;br /&gt;
&lt;br /&gt;
It appears the eggplant emoji (🍆) has been left out of the bracket.&lt;br /&gt;
&lt;br /&gt;
A robot face announcer-emoji (🤖) and a link to the full bracket was added at 38 minutes in. &lt;br /&gt;
https://www.xkcd.com/2131/emojidome_bracket.png shows 512 emojis in a single-elimination tournament.&lt;br /&gt;
https://www.xkcd.com/2131/emojidome_bracket_256.png was added later and shows the 256 emojis that competed on the second round.&lt;br /&gt;
https://www.xkcd.com/2131/emojidome_bracket_round_3.png was added for the third round.&lt;br /&gt;
&lt;br /&gt;
Real live data with results (clicks) can be seen as JSON-websocket at https://emojidome.xkcd.com/2131/socket&lt;br /&gt;
&lt;br /&gt;
A live (user-created) vote tally can be found at https://emojidome.playcode.io/ . Thanks Andy! (live updates)&lt;br /&gt;
&lt;br /&gt;
http://srv-01.valo.media/ has a tally with slightly more details. (live updates)&lt;br /&gt;
&lt;br /&gt;
https://phiresky.github.io/emojidome/ (reddit-user-created) live bracket display (live updates)&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
{{incomplete transcript|This transcript is for the image that embeds and automated programs usually see. Do NOT delete this tag too soon.}}&lt;br /&gt;
&lt;br /&gt;
:[A tournament bracket tree is shown with eight participants each on the left and right side, for a total of sixteen, all of which are the 😰 emoji (a face with eyebrows, one teardrop and a blue forehead). From both sides towards the middle the brackets reduce to eight, then four, two, and one line where the latter join to a rectangle in the middle.]&lt;br /&gt;
&lt;br /&gt;
:Visit xkcd.com to participate&lt;br /&gt;
&lt;br /&gt;
:&amp;lt;small&amp;gt;If you ''are'' on xkcd.com, then you're seeing this&amp;lt;/small&amp;gt;&lt;br /&gt;
:&amp;lt;small&amp;gt;because of something something JavaScript.&amp;lt;/small&amp;gt;&lt;br /&gt;
&lt;br /&gt;
:&amp;lt;small&amp;gt;Listen, websites are hard 😰&amp;lt;/small&amp;gt;&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;br /&gt;
&lt;br /&gt;
[[Category:April fools' comics]]&lt;br /&gt;
[[Category:Interactive comics]]&lt;br /&gt;
[[Category:Emoji]]&lt;/div&gt;</summary>
		<author><name>162.158.91.125</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=2117:_Differentiation_and_Integration&amp;diff=170280</id>
		<title>2117: Differentiation and Integration</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=2117:_Differentiation_and_Integration&amp;diff=170280"/>
				<updated>2019-02-28T09:19:34Z</updated>
		
		<summary type="html">&lt;p&gt;162.158.91.125: phone calls to mathematicians&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 2117&lt;br /&gt;
| date      = February 27, 2019&lt;br /&gt;
| title     = Differentiation and Integration&lt;br /&gt;
| image     = differentiation_and_integration.png&lt;br /&gt;
| titletext = &amp;quot;Symbolic integration&amp;quot; is when you theatrically go through the motions of finding integrals, but the actual result you get doesn't matter because it's purely symbolic.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
{{incomplete|Created by a BESSEL FUNCTION? Please mention here why this explanation isn't complete. Do NOT delete this tag too soon.}}&lt;br /&gt;
This comic provides a {{w|flowchart}} purporting to show the process of differentiation, and another for integration.&lt;br /&gt;
&lt;br /&gt;
{{w|Derivative|Differentiation}} and {{w|Antiderivative|Integration}} are two major components of {{w|calculus}}. As many Calculus 2 students are painfully aware, integration is much more complicated than the differentiation it undoes.&lt;br /&gt;
&lt;br /&gt;
However, Randall dramatically overstates this point here.  After the first step of integration, Randall assumes that any integration can not be solved so simply, and then dives into a step named &amp;quot;????&amp;quot;, suggesting that it is unknowable how to proceed.  The rest of the flowchart is (we can assume deliberately) even harder to follow, and does not reach a conclusion.  This is in contrast to the simple, straightforward flowchart for differentiation. The fact that the arrows in the bottom of the integration part leads to nowhere indicates that &amp;quot;Phone calls to mathematicians&amp;quot;, &amp;quot;Oh no&amp;quot; and &amp;quot;Burn the evidence&amp;quot; are not final steps in the difficult journey. The flowchart could be extended by Randall to God-know-where extents.&lt;br /&gt;
&lt;br /&gt;
It should be noted that Randall slightly undermines his point by providing four different methods, and an &amp;quot;etc&amp;quot;, for attempting differentiation with no guidelines for selecting between them.&lt;br /&gt;
&lt;br /&gt;
===Differentiation===&lt;br /&gt;
'''{{w|Chain rule}}'''&lt;br /&gt;
&lt;br /&gt;
For any &amp;lt;math&amp;gt; \frac{d}{dx}f(x)=f'(x)&amp;lt;/math&amp;gt; and &amp;lt;math&amp;gt; \frac{d}{dx}g(x)=g'(x) &amp;lt;/math&amp;gt;, it follows that &amp;lt;math&amp;gt; \frac{d}{dx}(f(g(x)))=f'(g(x))*g'(x)&amp;lt;/math&amp;gt;.&lt;br /&gt;
&lt;br /&gt;
'''{{w|Power Rule}}'''&lt;br /&gt;
&lt;br /&gt;
For any &amp;lt;math&amp;gt; f(x)=x^a &amp;lt;/math&amp;gt;, it follows that &amp;lt;math&amp;gt; \frac{d}{dx}f(x)=a*x^{a-1} &amp;lt;/math&amp;gt;.&lt;br /&gt;
&lt;br /&gt;
'''{{w|Quotient rule}}'''&lt;br /&gt;
&lt;br /&gt;
For any &amp;lt;math&amp;gt; \frac{d}{dx}f(x)=f'(x)&amp;lt;/math&amp;gt; and &amp;lt;math&amp;gt; \frac{d}{dx}g(x)=g'(x) &amp;lt;/math&amp;gt;, it follows that &amp;lt;math&amp;gt; \frac{d}{dx} \frac{f(x)}{g(x)}=\frac{f'(x)g(x)-f(x)g'(x)}{(g(x))^2}&amp;lt;/math&amp;gt; if &amp;lt;math&amp;gt;g(x)\ne 0&amp;lt;/math&amp;gt;.&lt;br /&gt;
&lt;br /&gt;
'''{{w|Product rule}}'''&lt;br /&gt;
&lt;br /&gt;
For any &amp;lt;math&amp;gt; \frac{d}{dx}f(x)=f'(x)&amp;lt;/math&amp;gt; and &amp;lt;math&amp;gt; \frac{d}{dx}g(x)=g'(x) &amp;lt;/math&amp;gt;, it follows that &amp;lt;math&amp;gt; \frac{d}{dx}(f(x)*g(x))=f'(x)*g(x)+f(x)*g'(x)&amp;lt;/math&amp;gt;.&lt;br /&gt;
&lt;br /&gt;
===Integration===&lt;br /&gt;
'''{{w|Integration by parts}}'''&lt;br /&gt;
&lt;br /&gt;
The &amp;quot;product rule&amp;quot; run backwards. Since &amp;lt;math&amp;gt;(uv)' = uv' + u'v&amp;lt;/math&amp;gt;, it follows that by integrating both sides you get &amp;lt;math&amp;gt; uv =  \int u dv + \int v du&amp;lt;/math&amp;gt;, which is more commonly written as &amp;lt;math&amp;gt;\int u dv = uv - \int v du&amp;lt;/math&amp;gt;. By finding appropriate values for functions &amp;lt;math&amp;gt;u, v&amp;lt;/math&amp;gt; such that your problem is in the form &amp;lt;math&amp;gt;\int u dv&amp;lt;/math&amp;gt;, your problem ''may'' be simplified.&lt;br /&gt;
&lt;br /&gt;
'''{{w|Integration by substitution|Substitution}}'''&lt;br /&gt;
&lt;br /&gt;
The &amp;quot;chain rule&amp;quot; run backwards. Since &amp;lt;math&amp;gt; d(f(u)) = (df(u))du&amp;lt;/math&amp;gt;, it follows that &amp;lt;math&amp;gt;f(u) = \int df(u) du&amp;lt;/math&amp;gt;. By finding appropriate values for functions &amp;lt;math&amp;gt;f, u&amp;lt;/math&amp;gt; such that your problem is in the form &amp;lt;math&amp;gt;\int df(u) du&amp;lt;/math&amp;gt; your problem ''may'' be simplified.&lt;br /&gt;
&lt;br /&gt;
'''{{w|Cauchy's integral formula|Cauchy's Formula}}'''&lt;br /&gt;
&lt;br /&gt;
Cauchy's Integral formula is a result in complex analysis that relates the value of a contour integral in the complex plane to properties of the singularities in the interior of the contour.  It is often used to compute integrals on the real line by extending the path of the integral from the real line into the complex plane to apply the formula, then proving that the integral from the parts of the contour not on the real line has value zero. &lt;br /&gt;
&lt;br /&gt;
'''{{w|Partial_fraction_decomposition#Application_to_symbolic_integration|Partial Fractions}}'''&lt;br /&gt;
&lt;br /&gt;
Partial fractions is a technique for breaking up a function that comprises one polynomial divided by another into a sum of functions comprising constants over the factors of the original denominator, which can easily be integrated into logarithms.&lt;br /&gt;
&lt;br /&gt;
'''{{w|Install Mathematica}}'''&lt;br /&gt;
&lt;br /&gt;
{{w|Mathematica}} is a modern technical computing system spanning most areas. One of its features is to compute mathematical functions. This step in the flowchart is to install and use Mathematica to do the integration for you.&lt;br /&gt;
&lt;br /&gt;
'''{{w|Riemann integral|Riemann Integration}}'''&lt;br /&gt;
The Riemann integral is a definition of definite integration. Elementary textbooks on calculus sometimes present finding a definite integral as a process of approximating an area by strips of equal width and then taking the limit as the strips become narrower. Riemann integration removes the requirement that the strips have equal width, and so is a more flexible definition. However there are still many functions for which the Riemann integral doesn't converge, and consideration of these functions leads to the Lebesgue Integral. Riemann integration is not a method of calculus appropriate for finding the anti-derivative of an elementary function.&lt;br /&gt;
&lt;br /&gt;
'''{{w|Stokes' Theorem}}''' &lt;br /&gt;
Stokes' theorem relates a surface integral of a the curl of the vector field to a line integral of the vector field around the boundary of the surface. If you're in this deep, there's a good chance that you're just randomly applying any analytical technique you can think of at this point. &lt;br /&gt;
&lt;br /&gt;
'''{{w|Risch Algorithm}}'''&lt;br /&gt;
The Risch Algorithm is a complex procedure that reduces the process of symbolic integration to purely algebraic steps. It is implemented in Computer Algebra software, such as Mathematica. A human would have to be pretty desperate to attempt this (presumably) by hand.&lt;br /&gt;
&lt;br /&gt;
'''{{w|Bessel function}}'''&lt;br /&gt;
Bessel functions are the solution to the differential equation &amp;lt;math&amp;gt; x^2 \frac{dy^2}{dx^2}+x \frac{dy}{dx}+(x^2-n^2)*y=0&amp;lt;/math&amp;gt;, where n is the order of Bessel function. Though they do show up in some engineering, physics, and abstract mathematics, in lower levels of calculus they are often a sign that the integration was not set up properly before someone put them into a symbolic algebra solver. &lt;br /&gt;
&lt;br /&gt;
'''{{w|Symbolic integration}}'''&lt;br /&gt;
Symbolic algebra is the basic process of finding an antiderivative, as opposed to numerically integrating a function. Randall plays off the joke that integration might as well be a symbol, like in a novel, because he can't get any meaningful results from his analysis. &lt;br /&gt;
&lt;br /&gt;
''' Phone calls to mathematicians '''&lt;br /&gt;
This step would indicate that the flowchart user, desperate from failed attempts to solve the problem, contacts some more skilled mathematicians by phone, and presumably asks them for help. The connected steps of &amp;quot;Oh no&amp;quot; and &amp;quot;Burn the evidence&amp;quot; may suggest the possibility that this interaction might not play out very well and could even get the caller in trouble.&lt;br /&gt;
Specialists and renowned experts being bothered - not to their amusement - by strangers, often at highly inconvenient times or locations, is a common comedic trope, also previously utilized by xkcd (for example in [[163: Donald Knuth]]).&lt;br /&gt;
&lt;br /&gt;
''' Burn the evidence '''&lt;br /&gt;
This phrase parodies a common trope in detective fiction, where characters burn notes, receipts, passports, etc. to maintain secrecy. This may refer to the burning of one's work to avoid the shame of being associated w/ such a badly failed attempt to solve the given integration problem.&lt;br /&gt;
Alternatively, this could be an ironic hint to the fact that in order to find the integral, it may even be necessary to break the law or upset higher powers, so that the negative consequences of a persecution can only be avoided by destroying the evidence.&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
{{incomplete transcript|Do NOT delete this tag too soon.}}&lt;br /&gt;
:[Two flow charts are shown.]&lt;br /&gt;
&lt;br /&gt;
:[The first flow chart has four steps in simple order, one with multiple recommendations.]&lt;br /&gt;
:DIFFERENTIATION&lt;br /&gt;
:Start&lt;br /&gt;
:Try applying&lt;br /&gt;
::Chain Rule&lt;br /&gt;
::Power Rule&lt;br /&gt;
::Quotient Rule&lt;br /&gt;
::Product Rule&lt;br /&gt;
::Etc.&lt;br /&gt;
:Done?&lt;br /&gt;
::Yes&lt;br /&gt;
::No&lt;br /&gt;
:Done!&lt;br /&gt;
&lt;br /&gt;
[The second flow chart begins like the first, then descends into chaos.]&lt;br /&gt;
:INTEGRATION&lt;br /&gt;
:Start&lt;br /&gt;
:Try applying&lt;br /&gt;
::Integration by Parts&lt;br /&gt;
::Substitution&lt;br /&gt;
:Done?&lt;br /&gt;
:Haha, Nope!&lt;br /&gt;
&lt;br /&gt;
:[Chaos, Roughly from left to right, top to bottom, direction arrows not included.]&lt;br /&gt;
::Cauchy's Formula&lt;br /&gt;
::????&lt;br /&gt;
::???!?&lt;br /&gt;
::???&lt;br /&gt;
::???&lt;br /&gt;
::?&lt;br /&gt;
::Partial Fractions&lt;br /&gt;
::??&lt;br /&gt;
::?&lt;br /&gt;
::Install Mathematica&lt;br /&gt;
::?&lt;br /&gt;
::Riemann Integration&lt;br /&gt;
::Stokes' Theorem&lt;br /&gt;
::???&lt;br /&gt;
::?&lt;br /&gt;
::Risch Algorithm&lt;br /&gt;
::???&lt;br /&gt;
::[Sad face.]&lt;br /&gt;
::?????&lt;br /&gt;
::???&lt;br /&gt;
::What the heck is a Bessel Function??&lt;br /&gt;
::Phone calls to mathematicians&lt;br /&gt;
::Oh No&lt;br /&gt;
::Burn the Evidence&lt;br /&gt;
::[More arrows pointing out of the image to suggest more steps.]&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;br /&gt;
[[Category:Analysis]]&lt;/div&gt;</summary>
		<author><name>162.158.91.125</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=887:_Future_Timeline&amp;diff=170274</id>
		<title>887: Future Timeline</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=887:_Future_Timeline&amp;diff=170274"/>
				<updated>2019-02-28T07:03:12Z</updated>
		
		<summary type="html">&lt;p&gt;162.158.91.125: /* 2015-2016 */ Windows Phone RIP&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 887&lt;br /&gt;
| date      = April 18, 2011&lt;br /&gt;
| title     = Future Timeline&lt;br /&gt;
| before    = [[#Explanation|↓ Skip to explanation ↓]]&lt;br /&gt;
| image     = future timeline.png&lt;br /&gt;
| titletext = Not shown: the approximately 30,000 identical, vaguely hysterical articles titled &amp;quot;WHITE PEOPLE IN [THE US/BRITAIN] TO BECOME MINORITY BY [YEAR]!&amp;quot;, which came up for basically any year I put in.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
&lt;br /&gt;
This comic uses the same strategy as comic [[715: Numbers]], in which [[Randall]] uses Google to search for phrases and then charts the results. This one is charted as a timeline, whereas 715 was charted as line graphs.&lt;br /&gt;
It is a list of things predicted or announced by anyone at any time (the ones you see on Google search using &amp;quot;by the year...&amp;quot; or similar statements).&lt;br /&gt;
&lt;br /&gt;
&amp;quot;2101 - War Was Beginning&amp;quot; is a reference to the opening narration of video game ''Zero Wing''; the same narration is famous for the internet meme &amp;quot;{{w|All your base are belong to us}}&amp;quot;. As there are not any other out and out references in the comic, and the rest are actually results that you can find using Randall's methods, &amp;quot;War Was Beginning&amp;quot; was probably the only thing he got when he googled 2101 as well.&lt;br /&gt;
&lt;br /&gt;
Certain events in this comic, e.g. &amp;quot;Social Security stops running surplus&amp;quot;, are repeated multiple times. Also, certain bizarre events, like &amp;quot;Apocalypse occurs&amp;quot;, or &amp;quot;Flying cars reach market&amp;quot;, happen before rather plausible things, like &amp;quot;HTML 5 Finished&amp;quot;. Certain events, like &amp;quot;Japan is a robot-only country&amp;quot; or &amp;quot;Gillette introduces 14-blade razor&amp;quot; may be related to the recurring theme [[605: Extrapolating]].&lt;br /&gt;
&lt;br /&gt;
The title text is born of a recurring &amp;quot;white people panic&amp;quot; situation; scaremongers will predict white minority in the very near future in order to get the panicked racist people to pay attention to them (without actually using valid or accepted scientific measurements to back up these claims- panicked racist people don't exactly fact-check very much), while level-headed sociologists will usually come up with more distant, if not nonexistent, dates from their extrapolations.&lt;br /&gt;
&lt;br /&gt;
This comic has similar features to [[1413: Suddenly Popular]], [[1093: Forget]], and [[891: Movie Ages]].&lt;br /&gt;
&lt;br /&gt;
===Accuracy===&lt;br /&gt;
====2012-2014====&lt;br /&gt;
The only predictions for this period that came true are that the world population has surpassed 7 billion. Canada formally withdrew from the Kyoto protocol in December 2011, and its emissions in 2012 were 18% ''above'' 1990 levels (though its population had grown 26% and its GDP had grown 67% in that period). Sadly, homelessness is still a problem in Massachusetts. The prediction about GNU/Linux operating systems remains false; although Android (which is built on the Linux kernel) is currently the most dominant OS, it is not completely GNU/Linux, which remains an extreme minority on consumer devices. And so far as we're aware, the apocalypse has yet to occur.&lt;br /&gt;
&lt;br /&gt;
====2015-2016====&lt;br /&gt;
{{w|New Horizons}} made its closest approach to Pluto in July 2015. It was never intended to ''land'' on Pluto, though the comic does not necessarily imply this.&lt;br /&gt;
&lt;br /&gt;
The other 2015 predictions did not come true, though some might claim gender equality was reached.&lt;br /&gt;
&lt;br /&gt;
{{w|Android OS}}' market share was already 84.4% as of the third quarter of 2014, showing that both estimates were overly conservative.&amp;lt;ref&amp;gt;http://www.idc.com/prodserv/smartphone-os-market-share.jsp&amp;lt;/ref&amp;gt; {{w|Windows Phone}} continued to have less than 30% of {{w|iOS}}' market share and has since been discontinued.&lt;br /&gt;
&lt;br /&gt;
====2017-2018====&lt;br /&gt;
None of the predictions for this period have come true.&lt;br /&gt;
&lt;br /&gt;
==The predictions==&lt;br /&gt;
{| class=&amp;quot;wikitable&amp;quot;&lt;br /&gt;
|-&lt;br /&gt;
! Year&lt;br /&gt;
! Prediction&lt;br /&gt;
! Further Details&lt;br /&gt;
! Outcome&lt;br /&gt;
|-&lt;br /&gt;
| rowspan=&amp;quot;4&amp;quot;| 2012&lt;br /&gt;
| World population&lt;br /&gt;
| Ever since the advent of modern medicine and the more efficient agricultural processes developed since the Industrial Revolution, the human population had been growing at an unprecedented rate. This has caused some people to worry about overpopulation, which would cause a scarcity of resources and overcrowding, and propose various solutions, most of which involve some form of eugenics. 7 billion is a landmark number because it is a multiple of 1 billion.&lt;br /&gt;
| Close: Earth reached 7 billion in late 2011.&lt;br /&gt;
|-&lt;br /&gt;
| Flying cars&lt;br /&gt;
| For decades, flying cars have been a staple of futuristic sci-fi and technological predictions. So far very few of these predictions, which to tend to hover around 5–10 years from whatever the current date is, have come true.&lt;br /&gt;
| False; still 5-10 years away. You could argue that helicopters count as flying cars.&lt;br /&gt;
|-&lt;br /&gt;
| Canada cuts greenhouse emissions&lt;br /&gt;
| Currently, the Earth is experiencing an unprecedented period of warming we call global warming, caused in part by greenhouse emissions, which are gases that help trap heat in the atmosphere. Countries have repeatedly gotten together and promised to stop emitting greenhouse gases, but so far they have failed to meet their targets.&lt;br /&gt;
| False. Canada withdrew from Kyoto treaty in late 2011.&lt;br /&gt;
|-&lt;br /&gt;
| Apocalypse occurs&lt;br /&gt;
| The end of a cycle of the Mayan calendar on December 22, 2012 has been used in popular culture as a basis for predicting the end of the world. Amongst other things, this included the film '2012'. Some people took this rather more seriously, and actually believed that the world would end on this date. &lt;br /&gt;
| False.{{Citation needed}}&lt;br /&gt;
|-&lt;br /&gt;
| rowspan=&amp;quot;4&amp;quot;| 2013&lt;br /&gt;
| National debt paid off&lt;br /&gt;
| For years, the subject of national debt has been a political point of contention, with the Republicans typically favoring paying it all off, and the Democrats more willing to spend to pull the country out of recessions in the economy. Clinton, a Democrat, at one point proposed [http://money.cnn.com/1999/06/28/economy/clinton/ paying off the debt by 2015].&lt;br /&gt;
| False.&lt;br /&gt;
|-&lt;br /&gt;
| Microchipping Americans&lt;br /&gt;
| Microchips are small computer chips, typically embedded in pets in case they get lost, that contain information about the pet. Some, more paranoid, people worry about the government microchipping everyone in an effort to monitor their activities.&lt;br /&gt;
| False, although [https://www.google.com/search?q=rfid+implants RFID implants] do exist.&lt;br /&gt;
|-&lt;br /&gt;
| Homelessness ended in MA&lt;br /&gt;
| In 2008, the Commission To End Homelessness in Massachusetts, under Governor Deval Patrick, proposed a plan to all but eliminate homelessness over the next five years (hence the 2013 end-date on the comic).&lt;br /&gt;
| False.&lt;br /&gt;
|-&lt;br /&gt;
| Health care reform law repealed&lt;br /&gt;
| A health care reform law, popularly known as Obamacare, was signed into law in 2010. Ever since, many Republicans have tried (in vain) to repeal it, disliking the idea that government should provide and require healthcare.&lt;br /&gt;
| Too early; almost repealed in 2017.&lt;br /&gt;
|-&lt;br /&gt;
| rowspan=&amp;quot;2&amp;quot;| 2014&lt;br /&gt;
| US leaves Afghanistan&lt;br /&gt;
| After the terrorist attack on the Twin Towers in New York City on September 11, 2001, the United States invaded Afghanistan, which at the time allegedly hosted the headquarters of al-Qaeda, the terrorist organization behind the attacks. The war has gone on since then, with the public growing increasingly tired of it. Public support now favors a withdrawal, but for military and logistical reasons, the government cannot simply move all the troops currently in Afghanistan home right now. For one, that would cause immediate chaos in the country. Therefore, the government instead promises to eventually withdraw all troops, planning on doing so by the end of 2014. &lt;br /&gt;
| False. As of April 2017, 11,000 US troops remain in Afghanistan.&lt;br /&gt;
|-&lt;br /&gt;
| GNU/Linux dominant OS&lt;br /&gt;
| An operating system, or OS, is the software that forms the structure in which applications on you computer function. Some typical OSs include Mac OS X, Windows 10, and Linux. The first two of those three are commercial products, sold as a copy by a company. The last is an open-source OS, one that anyone can download and modify free. Typically, open-source software is used by a small number of socially conscious people. &lt;br /&gt;
| False, although Linux-based Android dominated phones since 2011.&lt;br /&gt;
|-&lt;br /&gt;
| rowspan=&amp;quot;3&amp;quot;| 2015&lt;br /&gt;
| New Horizon reaches Pluto&lt;br /&gt;
| The New Horizon spacecraft is a U.S. space mission designed to go to Pluto and take photographs, collect samples, etc. &lt;br /&gt;
| True. [http://pluto.jhuapl.edu It reached Pluto on July 14, 2015].&lt;br /&gt;
|-&lt;br /&gt;
| Healthcare law causes hyperinflation&lt;br /&gt;
| The National Inflation Association warns that the [http://www.prnewswire.com/news-releases/healthcare-bill-to-cause-us-hyperinflation-by-2015-88711032.html Healthcare Bill to Cause U.S. Hyperinflation By 2015]&lt;br /&gt;
| False.&lt;br /&gt;
|-&lt;br /&gt;
| Millennium development goals achieved&lt;br /&gt;
| {{w|Millennium Development Goals}}&lt;br /&gt;
| False.&lt;br /&gt;
|-&lt;br /&gt;
| rowspan=&amp;quot;3&amp;quot;| 2016&lt;br /&gt;
| Baby boomers begin turning 65&lt;br /&gt;
| {{w|Baby boomers}} are individuals conceived in the years following World War Two, roughly defined as those born from 1946-1959. This isn't so much a prediction as basic math; if you were born in 1946, you turned 65 in 2011.&lt;br /&gt;
| True.&lt;br /&gt;
|-&lt;br /&gt;
| Android takes 38%/45% of market share&lt;br /&gt;
| {{w|Android (operating system)|Android}} is a popular operating system for smartphones and tablets, created by Google. Market share is the percentage of all devices that use the product, in this case the Android operating system. These entries together are humorous because they cannot both happen at the same time.&lt;br /&gt;
| Too late; passed these marks in 2010.&lt;br /&gt;
|-&lt;br /&gt;
| Windows phone overtakes iOS&lt;br /&gt;
| {{w|iOS}} is the operating system used by Apple iPhones. At the time of the comic, Apple's mobile OS is much more popular than Microsoft's. The article Randall found predicts that the tables will turn.&lt;br /&gt;
| False.&lt;br /&gt;
|-&lt;br /&gt;
| rowspan=&amp;quot;5&amp;quot;| 2017&lt;br /&gt;
| China completes lunar mission&lt;br /&gt;
| The {{w|Chinese space program}} has plans for extraterrestrial exploration, including a manned mission to the moon.&lt;br /&gt;
| False.&lt;br /&gt;
|-&lt;br /&gt;
| Social Security stops running surplus&lt;br /&gt;
| The first of many predictions about the United States {{w|Social Security (United States)|Social Security}} trust fund program, all predicting its decline due to a variety of factors.&lt;br /&gt;
| False&lt;br /&gt;
|-&lt;br /&gt;
| US budget balanced&lt;br /&gt;
| The {{w|United States federal budget}} outlines how much the US government spends on what in a given fiscal year. The budget is not required to be balanced, and so often more money is spent than is earned in revenue, causing the national debt to rise.&lt;br /&gt;
| False. Still far negative.&lt;br /&gt;
|-&lt;br /&gt;
| Newspapers become obsolete and die out&lt;br /&gt;
| The increasing popularity of internet media and mobile devices has caused a steady decline in the popularity of print media.&lt;br /&gt;
| False. Though newspapers are in decline, they are certainly not obsolete as of 2017.&lt;br /&gt;
|-&lt;br /&gt;
| Cosmetic surgery doubles&lt;br /&gt;
| {{w|Cosmetic Surgery}}&lt;br /&gt;
| False. According to the ASPS (American Society of Plastic Surgeons), 1.6 million cosmetic surgeries were performed in 2011, while 1.8 million were performed in 2017, an increase of only 0.2 million.&lt;br /&gt;
|-&lt;br /&gt;
| rowspan=&amp;quot;2&amp;quot;| 2018&lt;br /&gt;
| Social Security stops running surplus&lt;br /&gt;
| {{w|Social Security (United States)|Social Security}} again.&lt;br /&gt;
| Still false.&lt;br /&gt;
|-&lt;br /&gt;
| Jesus returns to Earth&lt;br /&gt;
| A number of Christians have attempted to predict the return of Christ (a.k.a. the second coming, the rapture) using clues from The Bible, even though the Bible itself says that &amp;quot;no man can know the date&amp;quot;. Several predicted dates have come and gone.&lt;br /&gt;
| False&lt;br /&gt;
|-&lt;br /&gt;
| rowspan=&amp;quot;2&amp;quot;| 2019&lt;br /&gt;
| Social Security stops running surplus&lt;br /&gt;
| {{w|Social Security (United States)|Social Security}} again.&lt;br /&gt;
| Still false.&lt;br /&gt;
|-&lt;br /&gt;
| Every baby has genes mapped at birth&lt;br /&gt;
| {{w|Gene Mapping}}&lt;br /&gt;
| False.&lt;br /&gt;
|-&lt;br /&gt;
| rowspan=&amp;quot;3&amp;quot;| 2020&lt;br /&gt;
| Solar power becomes cheaper than fossil fuels&lt;br /&gt;
| Scientists estimate that more than half of the {{w|fossil fuels}} in existence have already been found and that fossil fuel production will begin to decline due to the scarcity, causing prices to increase. At the same time, improvements in {{w|Solar Power|solar technology}} are causing the prices for solar energy to steadily decrease.&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| Keyboards and mice become obsolete&lt;br /&gt;
| {{w|Computer input device}} are beginning to adopt other methods of input, such as voice commands, touch screens, and eye tracking. While the use of touch screens in particular is gaining widespread use, as of 2014 none has come close to making keyboards and mice obsolete. None of them allows text input as fast as a keyboard, and none is suitable for writing program code.&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| New Tappan Zee bridge constructed&lt;br /&gt;
| A {{w|Tappan_Zee_Bridge#Replacement_bridge|replacement bridge}} was announced in 2008.&lt;br /&gt;
| Too late; completed in 2017.&lt;br /&gt;
|-&lt;br /&gt;
| rowspan=&amp;quot;4&amp;quot;| 2021&lt;br /&gt;
| US debt reaches 97% of GDP&lt;br /&gt;
| {{w|US Debt}}&lt;br /&gt;
| Too late; reached in 2011.&lt;br /&gt;
|-&lt;br /&gt;
| US unemployment falls to 2.8%&lt;br /&gt;
| {{w|Unemployment in the United States}}&lt;br /&gt;
| &lt;br /&gt;
|-&lt;br /&gt;
| Restored caliphate unifies Middle East&lt;br /&gt;
| A {{w|caliphate}} is a form of {{w|Islam|Islamic}} political-religious leadership, centred around a Caliph, or successor to the prophet {{w|Muhammad}}. This may be foreshadowing of the Islamic State of Iraq and greater Syria, which has as its goal the creation of a restored caliphate.&lt;br /&gt;
| &lt;br /&gt;
|-&lt;br /&gt;
| Lake Mead evaporates&lt;br /&gt;
| Formed by the {{w|Hoover Dam}} on the {{w|Colorado River}}, {{w|Lake Mead}} is the largest reservoir in the United States (measured by maximum capacity). It hasn't reached its capacity since 1983, due to drought and increased demand for water. This could be linked to {{w|global warming}}.&lt;br /&gt;
| &lt;br /&gt;
|-&lt;br /&gt;
| rowspan=&amp;quot;3&amp;quot;| 2022&lt;br /&gt;
| Kilimanjaro snow-free&lt;br /&gt;
| At 5,895 metres, {{w|Kilimanjaro}} is the highest mountain in {{w|Africa}}, and the highest free-standing mountain in the world. Around 85% of its ice cover disappeared between 1912 and 2011, and it continues to recede.&lt;br /&gt;
| &lt;br /&gt;
|-&lt;br /&gt;
| HTML 5 finished&lt;br /&gt;
| The World Wide Web Consortium (W3C) began work on {{w|HTML 5}} in 2004.&lt;br /&gt;
| Too late; 5.0 specification released in 2014, but incremental updates continue.&lt;br /&gt;
|-&lt;br /&gt;
| Newspapers become obsolete and die out&lt;br /&gt;
| This is the second time this prediction has appeared.&lt;br /&gt;
| &lt;br /&gt;
|-&lt;br /&gt;
| rowspan=&amp;quot;3&amp;quot;| 2023&lt;br /&gt;
| Jesus returns to Earth (again)&lt;br /&gt;
| A number of Christians have attempted to predict the return of Christ (a.k.a. the second coming, the rapture) using clues from The Bible, even though the Bible itself says that &amp;quot;no man can know the date&amp;quot;. Several predicted dates have come and gone.&lt;br /&gt;
| &lt;br /&gt;
|-&lt;br /&gt;
| US debt passes 100% of GDP&lt;br /&gt;
| This references the common fear that {{w|US Debt}} will exceed GDP, possibly causing [http://en.wikipedia.org/wiki/Economic_bubble economic turmoil].&lt;br /&gt;
| Too late; reached in 2012.&lt;br /&gt;
|-&lt;br /&gt;
| All unprotected ancient forests gone from Pacific Northwest&lt;br /&gt;
| Likely due to a combination of wildfire and {{w|deforestation}}&lt;br /&gt;
| &lt;br /&gt;
|-&lt;br /&gt;
| rowspan=&amp;quot;5&amp;quot;| 2024&lt;br /&gt;
| Atlantis begins to reappear&lt;br /&gt;
| {{w|Atlantis}} is the name of a fictional island, which is supposed to have been lost beneath the sea.&lt;br /&gt;
| &lt;br /&gt;
|-&lt;br /&gt;
| Orangutans extinct in wild&lt;br /&gt;
| {{w|Orangutan|Orangutans}} are a species of great ape, currently classed as an {{w|endangered species}}, and found only in the {{w|Rainforest|rainforests}} of {{w|Borneo}} and {{w|Sumatra}}.&lt;br /&gt;
| &lt;br /&gt;
|-&lt;br /&gt;
| China lands men and women on the moon&lt;br /&gt;
| The {{w|Chinese space program}} has plans for extraterrestrial exploration, including a manned mission to the moon.&lt;br /&gt;
| &lt;br /&gt;
|-&lt;br /&gt;
| NASA sets up permanent moon base&lt;br /&gt;
| There has been a lot of hype recently about finally returning to the moon, vis-a-vis Orion.&lt;br /&gt;
| &lt;br /&gt;
|-&lt;br /&gt;
| Female professionals pass males in pay&lt;br /&gt;
| There are two possible explanations for this entry: Either it's fear-mongering from misogynists or, more probably, an erroneous extrapolation from the current rate at which female incomes are catching up to male incomes.&lt;br /&gt;
| &lt;br /&gt;
|-&lt;br /&gt;
| rowspan=&amp;quot;4&amp;quot;| 2025&lt;br /&gt;
| World population reaches 8 billion&lt;br /&gt;
| Given current rates, it seems unlikely it will take this long to hit 8 billion, but advances in birth control options and especially their availability in developing nations may slow the current rate considerably.&lt;br /&gt;
| &lt;br /&gt;
|-&lt;br /&gt;
| Two billion people face water shortages&lt;br /&gt;
| http://english.pravda.ru/science/earth/28-01-2008/103693-water_crisis-0/&lt;br /&gt;
| &lt;br /&gt;
|-&lt;br /&gt;
| 62 MPG cars introduced&lt;br /&gt;
| 62 miles per gallon, ~3.8 L/100km. 62 MPG is a very good mileage rate at today's standard, even though [http://abcnews.go.com/Business/story?id=5231050&amp;amp;page=1 some cars can be driven carefully so as to attain over 100 MPG].&lt;br /&gt;
| &lt;br /&gt;
|-&lt;br /&gt;
| US power fades&lt;br /&gt;
| http://www.cbsnews.com/news/report-us-power-will-fade-by-2025/&lt;br /&gt;
| Hard to know what the precise metric for this would be.&lt;br /&gt;
|-&lt;br /&gt;
| rowspan=&amp;quot;5&amp;quot;| 2026&lt;br /&gt;
| Atlantis emerges completely&lt;br /&gt;
| {{w|Atlantis}} is the name of a fictional island, which is supposed to have been lost beneath the sea. It seems that it has taken 2 years for it to emerge completely.&lt;br /&gt;
| &lt;br /&gt;
|-&lt;br /&gt;
| Rock Bands die out&lt;br /&gt;
| https://bestbands.wordpress.com/2009/01/25/rock-bands-to-die-out-by-2026/&lt;br /&gt;
| &lt;br /&gt;
|-&lt;br /&gt;
| US debt paid off&lt;br /&gt;
| {{w|US Debt}}&lt;br /&gt;
| &lt;br /&gt;
|-&lt;br /&gt;
| Car accidents cease&lt;br /&gt;
| Presumably, cars will be fully automated and able to pilot themselves at this point and will have fail-safes that prevent collisions currently attributed to user error. Car accidents will always be possible, however, due to mechanical and electrical failures.&lt;br /&gt;
| &lt;br /&gt;
|-&lt;br /&gt;
| West coast falls into ocean&lt;br /&gt;
| Most likely due to {{w|San_Andreas_Fault#The_next_.22Big_One.22|a significant seismic event}}&lt;br /&gt;
| &lt;br /&gt;
|-&lt;br /&gt;
| rowspan=&amp;quot;3&amp;quot;| 2027&lt;br /&gt;
| Japan introduces new fastest Maglev train&lt;br /&gt;
| Japan's railway systems are famous for their &amp;quot;bullet trains&amp;quot;, or {{w|Shinkansen}}.&lt;br /&gt;
| &lt;br /&gt;
|-&lt;br /&gt;
| Lyndon Larouche-planned Mars colony is established&lt;br /&gt;
| http://totse.mattfast1.com/en/technology/space_astronomy_nasa/moonmars.html&lt;br /&gt;
| &lt;br /&gt;
|-&lt;br /&gt;
| Social Security stops running surplus&lt;br /&gt;
| {{w|Social Security (United States)|Social Security}} again.&lt;br /&gt;
| &lt;br /&gt;
|-&lt;br /&gt;
| rowspan=&amp;quot;4&amp;quot;| 2028&lt;br /&gt;
| Tobacco outlawed&lt;br /&gt;
| Tobacco products (cigarettes and chewing tobacco) have become more and more taboo in modern culture, with most public places and private businesses forbidding their use indoors and near places children congregate.&lt;br /&gt;
| &lt;br /&gt;
|-&lt;br /&gt;
| 40% of coral reefs gone&lt;br /&gt;
| Many factors have been attributed to the decline of {{w|Coral_reef#Threats|coral reefs}}, including mining, over fishing, and rising ocean tempteratures.&lt;br /&gt;
| &lt;br /&gt;
|-&lt;br /&gt;
| US debt paid off&lt;br /&gt;
| {{w|US Debt}} [http://www.nytimes.com/2011/03/27/business/27view.html It’s 2026, and the Debt Is Due].&lt;br /&gt;
| &lt;br /&gt;
|-&lt;br /&gt;
| Social Security stops running surplus&lt;br /&gt;
| {{w|Social Security (United States)|Social Security}} again&lt;br /&gt;
| &lt;br /&gt;
|-&lt;br /&gt;
| rowspan=&amp;quot;4&amp;quot;| 2029&lt;br /&gt;
| Social Security trust fund exhausted&lt;br /&gt;
| {{w|Social Security (United States)|Social Security}}&lt;br /&gt;
| &lt;br /&gt;
|-&lt;br /&gt;
| Computers pass the Turing test&lt;br /&gt;
| It is no coincidence that 2029 is the timeline for Terminator Movies.&lt;br /&gt;
| Some computers already clear the Turing Test about 30% of the time.&lt;br /&gt;
|-&lt;br /&gt;
| Aging reversed&lt;br /&gt;
| Manhattan Beach Project to reverse aging by 2029&lt;br /&gt;
| &lt;br /&gt;
|-&lt;br /&gt;
| Wikipedia reaches 30 Million articles&lt;br /&gt;
| &lt;br /&gt;
| As of 00:00, 5 January 2015 (UTC), Wikipedia has over 34 million total articles, if all languages are included. The source being cited may have meant the English language Wikipedia, which has only 5.549 million articles, as of 12 January 2017.&lt;br /&gt;
|-&lt;br /&gt;
| rowspan=&amp;quot;3&amp;quot;| 2030&lt;br /&gt;
| Half of Amazon rain forest lost to logging&lt;br /&gt;
| WWF press release - [http://www.worldwildlife.org/press-releases/climate-change-speeds-up-amazon-s-destruction-says-wwf Climate Change Speeds Up Amazon’s Destruction] referring to a report on the [http://assets.panda.org/downloads/amazonas_eng_04_12b_web.pdf Amazon's vicious cycles] (PDF)&lt;br /&gt;
| &lt;br /&gt;
|-&lt;br /&gt;
| Cancer deaths double from 2008 levels&lt;br /&gt;
| From the [http://www.cancer.org/myacs/newengland/global-cancer-burden-to-double-by-2030 Global Cancer Burden to Nearly Double by 2030] article about the article from page 37 of [http://www.cancer.org/research/cancerfactsfigures/globalcancerfactsfigures/global-facts-figures-2nd-ed Global Cancer Facts &amp;amp; Figures 2nd edition].&lt;br /&gt;
| &lt;br /&gt;
|-&lt;br /&gt;
| Arctic ice-free in summer&lt;br /&gt;
| http://news.nationalgeographic.com/news/2009/10/091015-arctic-ice-free-gone-video-ap.html&lt;br /&gt;
| &lt;br /&gt;
|-&lt;br /&gt;
| rowspan=&amp;quot;3&amp;quot;| 2031&lt;br /&gt;
| Computers controlled by thought&lt;br /&gt;
| http://www.gizmag.com/future-mobile-technology/17554/&lt;br /&gt;
| As of 2017, this is {{w|Brain–computer interface|already possible}}&lt;br /&gt;
|-&lt;br /&gt;
| Realtors replaced by technology&lt;br /&gt;
| http://agbeat.com/editorials/will-realtors-be-replaced-by-technology-by-the-year-2031/&lt;br /&gt;
| &lt;br /&gt;
|-&lt;br /&gt;
| Social Security trust fund exhausted&lt;br /&gt;
| http://crfb.org/blogs/cbo-95-percent-confident-social-security-trust-fund-runs-out-25-years&lt;br /&gt;
| &lt;br /&gt;
|-&lt;br /&gt;
| rowspan=&amp;quot;3&amp;quot;| 2032&lt;br /&gt;
| &amp;quot;Big One&amp;quot; hits San Francisco&lt;br /&gt;
| http://www.sfgate.com/bayarea/article/Quake-scientists-predict-Big-One-likely-by-2032-2653745.php {{w|San Franscisco}} is located on the {{w|San Andreas Fault}}, which is predicted to produce a magnitude 7+ earthquake in the 'near future'. This event is referred to as {{w|San_Andreas_Fault#The_next_.22Big_One.22|&amp;quot;The Big One&amp;quot;}}.&lt;br /&gt;
| &lt;br /&gt;
|-&lt;br /&gt;
| US elects first married lesbian President&lt;br /&gt;
| http://4chandata.org/g/In-what-major-ways-do-you-think-the-world-of-2032-will-be-different-from-that-of-today-a20155&lt;br /&gt;
| &lt;br /&gt;
|-&lt;br /&gt;
| Entire world converted to Christianity&lt;br /&gt;
| http://www.goddiscussion.com/38920/christian-domininionsts-to-take-over-the-world-by-2032/&lt;br /&gt;
| &lt;br /&gt;
|-&lt;br /&gt;
| rowspan=&amp;quot;3&amp;quot;| 2033&lt;br /&gt;
| Kilimanjaro ice disappears&lt;br /&gt;
| http://www.reuters.com/article/2009/11/02/idUSL2210825&lt;br /&gt;
| &lt;br /&gt;
|-&lt;br /&gt;
| India becomes superpower&lt;br /&gt;
| https://www.facebook.com/pages/India-A-SuperPower-by-2033/151177191568098 ?&lt;br /&gt;
| &lt;br /&gt;
|-&lt;br /&gt;
| Europe reaches Mars&lt;br /&gt;
| [http://www.spacedaily.com/news/esa-general-03zb.html Specifically, a manned European mission]. ESA's {{w|Mars Express}} probe landed in 2003.&lt;br /&gt;
| &lt;br /&gt;
|-&lt;br /&gt;
| rowspan=&amp;quot;2&amp;quot;| 2034&lt;br /&gt;
| US diabetes cases double, treatment costs triple&lt;br /&gt;
| [http://www.reuters.com/article/2009/11/27/us-diabetes-usa-costs-idUSTRE5AQ0C220091127 U.S. diabetes cases to double, costs triple by 2034]&lt;br /&gt;
| &lt;br /&gt;
|-&lt;br /&gt;
| US builds autonomous robot army&lt;br /&gt;
| The concept of robots built for military service is another common element of science fiction stories. [http://www.aos-inc.com/index.php/medialias/press-releases?id=112 Unmanned Systems] article, about the [http://www.dtic.mil/cgi-bin/GetTRDoc?AD=ADA522247 2009-2034 Unmanned Systems Integrated Roadmap] publication ([http://www.amazon.com/2009-Unmanned-Integrated-Aircraft-Technologies-ebook/dp/B0047743A0 details at Amazon])&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| rowspan=&amp;quot;3&amp;quot;| 2035&lt;br /&gt;
| 80% of America's energy comes from renewable sources&lt;br /&gt;
| From fact sheet on Obama's [http://www.whitehouse.gov/the-press-office/2011/01/25/fact-sheet-state-union-president-obamas-plan-win-future State of the Union]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| Himalayan glaciers down 80% in size&lt;br /&gt;
| From an IPCC report on [https://web.archive.org/web/20100116132657/http://www.ipcc.ch/publications_and_data/ar4/wg2/en/ch10s10-6-2.html The Himalayan glaciers] that has been analysed in quite some depth. See for example detailed article on an [http://www.yaleclimateconnections.org/2010/02/anatomy-of-ipccs-himalayan-glacier-year-2035-mess/ anatomy of IPCC’s mistake].&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| Arctic sea lane opens&lt;br /&gt;
| [http://www.ft.com/cms/s/0/730ef8fe-27e1-11e0-8abc-00144feab49a.html#axzz3OBgEHYNY Arctic sea lane could open by 2035]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| rowspan=&amp;quot;2&amp;quot;| 2036&lt;br /&gt;
| 80% of US has access to high-speed rail&lt;br /&gt;
| [http://www.wnyc.org/story/284946-obama-80-percent-of-americans-should-have-access-to-high-speed-rail-by-2036/ Obama: 80 Percent of Americans Should Have Access to High Speed Rail By 2036]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| Asteroid Apophis misses/hits Earth&lt;br /&gt;
| http://neo.jpl.nasa.gov/apophis/   http://neo.jpl.nasa.gov/apophis/  99942 Apophis is a near-Earth asteroid that caused a brief period of concern in December 2004 because initial observations indicated a probability of up to 2.7% that it would hit Earth on April 13, 2029.&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| rowspan=&amp;quot;2&amp;quot;| 2037&lt;br /&gt;
| Arctic ice-free in September&lt;br /&gt;
| {{w|Arctic sea ice decline}}&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| Social Security trust fund exhausted&lt;br /&gt;
| {{w|Social Security (United States)|Social Security}}&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| rowspan=&amp;quot;2&amp;quot;| 2038&lt;br /&gt;
| 32-bit timestamps roll over, causing Y2K-level chaos&lt;br /&gt;
| 03:14:07 UTC on 19 January 2038, the value of time_t rolls over, that is it will return to zero.  time_t is a computing standard measurement of time; it is a count of the number of seconds since 00:00:00 UTC on 1 January 1970.  time_t is used by most computer systems to store date and time information.  It is recommended that new software should convert to a 64 bit time_t; indeed, most operating systems designed to run on 64-bit hardware already use signed 64-bit time_t integers.  This would give an epoch of 15:30:08 UTC on 4 December 292,277,026,596 (292 billion years away).  Of course, legacy systems may not be upgradable so action taken now should prevent this becoming a problem closer to 2038...&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| &amp;quot;Big One&amp;quot; hits California&lt;br /&gt;
| [http://www.presstelegram.com/technology/20080414/the-big-one-likely-to-hit-by-2038 `The big one' likely to hit by 2038]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| rowspan=&amp;quot;3&amp;quot;| 2039&lt;br /&gt;
| US population hits 400 Million&lt;br /&gt;
| [http://www.prb.org/Publications/Articles/2008/us400million.aspx U.S. Population Projected to Hit 400 Million in 2039]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| Severe heat waves become commonplace&lt;br /&gt;
| [http://news.stanford.edu/news/2010/july/extreme-heat-study-070810.html Heat waves and extremely high temperatures could be commonplace in the U.S. by 2039, Stanford study finds]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| Scientology becomes majority religion in US&lt;br /&gt;
| [http://home.snafu.de/tilman/2039.html Essay: Scientology in the year 2039]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| rowspan=&amp;quot;2&amp;quot;| 2040&lt;br /&gt;
| Arctic summers ice-free&lt;br /&gt;
| [http://www.livescience.com/9419-arctic-summer-ice-free-2040.html Arctic Summer Could be Ice-Free by 2040]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| Nanotechnology makes humans immortal&lt;br /&gt;
| [http://www.computerworld.com/article/2528330/app-development/nanotech-could-make-humans-immortal-by-2040--futurist-says.html Nanotech could make humans immortal by 2040, futurist says]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| 2041&lt;br /&gt;
| Social Security trust fund exhausted&lt;br /&gt;
| {{w|Social Security (United States)|Social Security}}&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| 2043&lt;br /&gt;
| World population passes 9 Billion&lt;br /&gt;
| {{w|Population growth}}&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| rowspan=&amp;quot;2&amp;quot;| 2044&lt;br /&gt;
| Mankind genetically engineered to be happy&lt;br /&gt;
| Premise of the movie [http://www.imdb.com/title/tt1363468/ Zenith] - further details are in the [http://www.filmjournal.com/filmjournal/content_display/esearch/e3i25130cd57f1590bda4527c098ac85b01 film review for Zenith]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| Childhood obesity reaches 100%&lt;br /&gt;
| [http://www.ivanhoe.com/channels/p_channelstory.cfm?storyid=11414 100-Percent Childhood Obesity Predicted by 2044]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| 2045&lt;br /&gt;
| Humans and machines merge&lt;br /&gt;
| Ray Kurzweil predicts of 'singularity' which will lead to race of super intelligent beings&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| 2046&lt;br /&gt;
| World's natural resources depleted&lt;br /&gt;
| [http://raphaelvanlaer.wordpress.com/2012/02/22/peak-uncertainty-when-will-we-run-out-of-fossil-fuels/ Peak uncertainty, when will we run out of fossil fuels?]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| rowspan=&amp;quot;3&amp;quot;| 2047&lt;br /&gt;
| World ruled by banks and corporations&lt;br /&gt;
| [http://www.amazon.co.uk/Future-Schlock-2047-RM-Krakoff-ebook/dp/B0039IT37Q Future Schlock] - the story of a world turned upside down in 2047&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| Tobacco industry fails&lt;br /&gt;
| [http://www.news.wisc.edu/16857 Experts: Big Tobacco dead by 2047, possibly sooner]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| US begins using autonomous attack drones&lt;br /&gt;
| [http://www.theguardian.com/world/2009/aug/22/us-air-force-drones-pilots-afghanistan US Air Force prepares drones to end era of fighter pilots]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| rowspan=&amp;quot;3&amp;quot;| 2048&lt;br /&gt;
| Salt-water fish extinct from overfishing&lt;br /&gt;
| WWF report on [http://wwf.panda.org/about_our_earth/blue_planet/problems/problems_fishing/ Unsustainable fishing]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| Unisex bathing suits cover body from shoulder to ankle&lt;br /&gt;
| [http://future.wikia.com/wiki/RyansWorld:_Bathing_Suits_of_the_Future RyansWorld: Bathing Suits of the Future]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| Entire US population overweight&lt;br /&gt;
| Article archive - [https://web.archive.org/web/20090321075605/http://thestatsblog.wordpress.com/2008/07/29/scientists-say-thin-people-face-extinction-in-united-states-everyone-will-be-overweight-by-2048-%E2%80%93-and-less-smart Scientists Say Thin People Face Extinction in United States: Everyone Will Be Overweight by 2048 – And Less Smart]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| rowspan=&amp;quot;3&amp;quot;| 2049&lt;br /&gt;
| $1.000 computer exceeds computational ability of humanity&lt;br /&gt;
| [http://www.americanbar.org/content/newsletter/publications/technology_e_report_home/2007_may_technotes.html TechNotes: Trends in Technology]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| Singularity occurs&lt;br /&gt;
| [http://www.prismdecision.com/the-singularity-is-near The Singularity Is Near]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| Fishing industry collapses&lt;br /&gt;
| This tends to happen when your food-stock is extinct - see WWF report on [http://wwf.panda.org/about_our_earth/blue_planet/problems/problems_fishing/ Unsustainable fishing]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| rowspan=&amp;quot;5&amp;quot;| 2050&lt;br /&gt;
| 80% of Earth's population lives in urban centers&lt;br /&gt;
| [http://infochangeindia.org/population/books-a-reports/80-of-world-population-will-soon-be-in-urban-areas.html 80% of world population will soon be in urban areas]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| China controls space&lt;br /&gt;
| [https://books.google.com/books?id=op851Uf99LQC&amp;amp;dq=China+controls+space+2050&amp;amp;source=gbs_navlinks_s Space Science &amp;amp; Technology in China: A Roadmap to 2050]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| Sex with robots possible&lt;br /&gt;
| [http://www.livescience.com/1951-forecast-sex-marriage-robots-2050.html Forecast: Sex and Marriage with Robots by 2050]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| Cars banned from European cities&lt;br /&gt;
| [http://www.telegraph.co.uk/motoring/news/8411336/EU-to-ban-cars-from-cities-by-2050.html EU to ban cars from cities by 2050]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| One million species extinct from climate change&lt;br /&gt;
| [http://news.nationalgeographic.com/news/2004/01/0107_040107_extinction.html By 2050 Warming to Doom Million Species, Study Says]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| 2051&lt;br /&gt;
| Atmosphere escapes into space&lt;br /&gt;
| [http://www.thehulltruth.com/boating-outdoor-photos/255705-have-you-ever-seen-fallstreak-hole.html Conspiracy theory] relating to {{w|Fallstreak hole}} or hole punch clouds.&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| 2052&lt;br /&gt;
| Medicare, Medicaid, and Social Security spending exceed total US revenue&lt;br /&gt;
| {{w|Social Security (United States)|Social Security}}&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| rowspan=&amp;quot;3&amp;quot;| 2053&lt;br /&gt;
| US budget balanced&lt;br /&gt;
| [http://crfb.org/blogs/omb-releases-long-term-projections-fy2015-budget-proposal OMB releases long-term projections for the FY2015 budget proposal]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| Majority of Americans in prison&lt;br /&gt;
| [http://articles.philly.com/1992-06-14/news/26032105_1_prison-officials-prison-time-prison-commissioners 'Beyond Bricks And Bars' As Jails Overflow, The Lock-'em-up Credo Is Drawing Unlikely Criticism - From Prison Officials Themselves]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| Cars driven by dogs&lt;br /&gt;
| &lt;br /&gt;
| This has [http://www.youtube.com/watch?v=BWAK0J8Uhzk already occurred] in 2012!&lt;br /&gt;
|-&lt;br /&gt;
| 2054&lt;br /&gt;
| Hunger becomes unimaginable global problem&lt;br /&gt;
| [http://www.albionmonitor.com/0403a/earth2054.html Hunger Could Be 'Unimaginable' Global Problem By 2054]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| rowspan=&amp;quot;3&amp;quot;| 2055&lt;br /&gt;
| Atmospheric CO2 doubled&lt;br /&gt;
| [http://cmi.princeton.edu/wedges/flash_intro.php Carbon Mitigation Initiative: Stabilization Wedges]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| Oil runs out&lt;br /&gt;
| [http://raphaelvanlaer.wordpress.com/2012/02/22/peak-uncertainty-when-will-we-run-out-of-fossil-fuels/ Peak uncertainty, when will we run out of fossil fuels?]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| Copper, tin, lead, gold, and nickel all exhausted&lt;br /&gt;
| [http://www.environmentalgraffiti.com/environment/5-valuable-metals-that-could-vanish-by-2055 5 Valuable Metals That Could Vanish by 2055]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| rowspan=&amp;quot;2&amp;quot;| 2056&lt;br /&gt;
| RFID-tagged driverless cars&lt;br /&gt;
| [http://www.zdnet.com/article/rfid-tagged-driverless-cars-on-roads-by-2056/ RFID-tagged driverless cars on roads by 2056]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| Robots given same rights as humans&lt;br /&gt;
| [http://www.cc.gatech.edu/news/robots-given-same-rights-humans-2056 Robots Given Same Rights As Humans By 2056]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| rowspan=&amp;quot;2&amp;quot;| 2057&lt;br /&gt;
| 150 Japanese settlers on Mars&lt;br /&gt;
| [http://connection.ebscohost.com/c/articles/9011051292/will-japan-colonize-mars Will Japan colonize Mars?]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| Colorado River runs dry&lt;br /&gt;
| [http://news.agu.org/press-release/colorado-river-reservoirs-could-bottom-out-from-warming-business-as-usual/ Colorado River Reservoirs Could Bottom Out From Warming]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| 2058&lt;br /&gt;
| Smoking ends in New Zealand&lt;br /&gt;
| [http://www.nzherald.co.nz/nz/news/article.cfm?c_id=1&amp;amp;objectid=10698966 Smoking to die out in NZ by 2058]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| 2059&lt;br /&gt;
| Humans have domesticated robots&lt;br /&gt;
| [http://diehardempiricist.blogspot.co.nz/2012/05/6-may-2011-virtual-necking-demography.html Virtual necking, demography, and robots]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| rowspan=&amp;quot;4&amp;quot;| 2060&lt;br /&gt;
| Human race lives in peace&lt;br /&gt;
| [http://www.arasfoundation.org/vision.html ARAS vision/mission]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| Extreme droughts across much of Earth&lt;br /&gt;
| [http://wdas.cosmosmagazine.com/news/extreme-drought-across-most-earth-30-years/ Extreme drought across most of Earth by 2060]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| Global temperature rise reaches 4&amp;amp;nbsp;°C&lt;br /&gt;
| {{w|Avoiding dangerous climate change}}&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| Oil runs out again&lt;br /&gt;
| [http://business.financialpost.com/2011/04/01/oil-may-run-out-by-2060-hsbc/?__lsa=98a7-5c61 Oil may run out by 2060: HSBC]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| 2061&lt;br /&gt;
| Halley's comet returns&lt;br /&gt;
| Halley's comet returns to the inner solar system (the vicinity of earth and the sun) every 75.3 years.  The last time it was near earth was in 1985-1986.  When it next returns, its closest approach to the sun will occur on 28 July 2061.&amp;lt;ref name=horizons&amp;gt;[http://ssd.jpl.nasa.gov/horizons.cgi Donald K. Yeomans. &amp;quot;Horizon Online Ephemeris System&amp;quot;. California Institute of Technology, Jet Propulsion Laboratory. Retrieved 8 September 2006.]&amp;lt;/ref&amp;gt;&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| rowspan=&amp;quot;2&amp;quot;| 2062&lt;br /&gt;
| Uganda hosts World Cup&lt;br /&gt;
| [http://shillingscents.blogspot.co.nz/2010/07/uganda-to-host-world-cup-in-2062.html Uganda to host world cup in 2062]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| The Jetsons&lt;br /&gt;
| {{w|The Jetsons}} was an animated science fiction sitcom that first aired in 1962. The show was set in the year 2062.&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| rowspan=&amp;quot;4&amp;quot;| 2063&lt;br /&gt;
| First human clones reach adulthood&lt;br /&gt;
| [http://au.ign.com/articles/2004/04/28/the-fall-last-days-of-gaia-diary-2 The Fall - Last Days of Gaia Diary #2]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| Population of Moon reaches 100,000&lt;br /&gt;
| Reading Eagle newspaper article from July 17, 1963 - [http://news.google.com/newspapers?nid=1955&amp;amp;dat=19630717&amp;amp;id=PhgrAAAAIBAJ&amp;amp;sjid=B50FAAAAIBAJ&amp;amp;pg=4055,6599008 Moon Population of 100,000 Is Predicted for 2063] and [http://www.paleofuture.com/blog/2008/3/14/air-force-predictions-for-2063-1963.html Air Force Predictions for 2063 (1963)]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| Population of Mars reaches 10,000&lt;br /&gt;
| [http://www.paleofuture.com/blog/2008/3/14/air-force-predictions-for-2063-1963.html Air Force Predictions for 2063 (1963)]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| Spacecraft exceed speed of light&lt;br /&gt;
| Physics as currently understood states that it is impossible to exceed the speed of light. A monumental shift in our physics would have had to have occurred for this to come true. This is a reference to the 8th Star Trek feature Film: &amp;quot;Star Trek:  First Contact&amp;quot; where Zefram Cochrane performs the first human Warp Flight on April 5, 2063.&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| 2064&lt;br /&gt;
| Clean Air Act finishes reducing haze in national parks to natural levels&lt;br /&gt;
| [http://www.cleanhouston.org/air/features/hazyfuture.htm State plan guarantees a hazy future for Texas’ wilderness areas]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| rowspan=&amp;quot;2&amp;quot;| 2065&lt;br /&gt;
| Last coral reefs die out&lt;br /&gt;
| From an [http://www.edgeofexistence.org/coral_reef_conservation/coral_reef_video.php article about a video called Reefs on the Edge] set in 2065 where a 15-year-old girl tells her grandfather's stories of coral reefs, and their demise.&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| Chernobyl cleanup complete&lt;br /&gt;
| [http://rt.com/politics/chernobyl-clean-in-55-years-time/ Chernobyl clean in 55 years time?]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| 2066&lt;br /&gt;
| Cyprus achieves its goal&lt;br /&gt;
| This is from some [http://www.cyprus-forum.com/cyprus33608-110.html#p665612 forum posts on the decendants of Cypriots] that lends support to the autonomy of Cyprus from Greek or Turkey.&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| rowspan=&amp;quot;2&amp;quot;| 2067&lt;br /&gt;
| Americans live in domed cities and watch 3D TV&lt;br /&gt;
| The article at [http://blogs.lib.unc.edu/ncm/index.php/2013/11/15/artifact-of-the-month-slide-rule-1916/ Artifact of the Month: Slide rule, 1916] includes information from the International Slide Rule Museum that &amp;quot;in 1967, Keuffel &amp;amp; Esser Co. commissioned a study of the future, predicting that Americans in 2067 would live in domed cities and watch 3D television.&amp;quot;&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| Redheads go extinct&lt;br /&gt;
| [http://science.howstuffworks.com/life/genetic/redhead-extinction.htm Are redheads going extinct?]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| rowspan=&amp;quot;3&amp;quot;| 2068&lt;br /&gt;
| Ozone hole over Antarctic finishes recovering&lt;br /&gt;
| [http://www.theozonehole.com/recovery.htm NASA Study Finds Clock Ticking Slower On Ozone Hole Recovery]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| Lord Jesus rules the Earth from Throne in Jerusalem.&lt;br /&gt;
| [http://myth-one.com/chapter_8.htm The Resurrections -- What Really Happens]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| Entire world population gay due to chemicals in the water&lt;br /&gt;
| [http://thedailybanter.com/2013/01/alex-jones-the-government-is-trying-to-make-more-gay-people/ Alex Jones talks about chemicals that make people gay]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| 2069&lt;br /&gt;
| Public masturbation legalized&lt;br /&gt;
|  [http://uncyclopedia.wikia.com/wiki/UnNews:It's_still_not_okay_to_Pull_Your_Penis_out_in_Public It's still not okay to Pull Your Penis out in Public]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| rowspan=&amp;quot;3&amp;quot;| 2070&lt;br /&gt;
| World population peaks&lt;br /&gt;
| [http://www.newscientist.com/article/dn1108-global-population-to-peak-in-2070.html Global population to peak in 2070]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| City-scale flooding disasters&lt;br /&gt;
| [http://www.telegraph.co.uk/news/earth/earthnews/3317033/City-scale-flooding-disasters-predicted-by-2070.html City-scale flooding disasters predicted by 2070]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| 60% of world's energy comes from renewable sources&lt;br /&gt;
| [http://www.ssisolarenergy.com/solar-alternative-energy/ What Is Alternative Energy All About?]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| rowspan=&amp;quot;2&amp;quot;| 2071&lt;br /&gt;
| Europe's temperatures rise by 3&amp;amp;nbsp;°C&lt;br /&gt;
| [http://www.umweltbundesamt.de/en/topics/climate-energy/climate-change-adaptation/adaptation-tools/project-catalog/peseta-projection-of-economic-impacts-of-climate Projection of Economic impacts of climate change in Sectors of the European Union based on bottom-up Analysis]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| World summer temperatures rise by 5&amp;amp;nbsp;°C&lt;br /&gt;
| [http://www.climateadaptation.eu/denmark/climate-change/ See &amp;quot;Air temperature changes in the 21st century&amp;quot;]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| 2072&lt;br /&gt;
| US retirement age is set to 75&lt;br /&gt;
| [http://money.usnews.com/money/retirement/articles/2012/06/11/how-high-will-the-retirement-age-go Up to 70-80 years]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| 2073&lt;br /&gt;
| Oceans do not rise one foot&lt;br /&gt;
| [http://www.skepticalscience.com/sea-level-rise-predictions.htm More like 2 feet]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| rowspan=&amp;quot;2&amp;quot;| 2074&lt;br /&gt;
| Number of 100-year-olds reaches one million&lt;br /&gt;
| [http://www.highbeam.com/doc/1P2-8848188.html UK to have 1 million centenarians by 2074]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| Supertyphoons hit Japan&lt;br /&gt;
| [http://www.japantimes.co.jp/news/2009/09/08/national/super-typhoons-in-store-as-seas-warm/ Super typhoons in store as seas warm]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| 2075&lt;br /&gt;
| US retirement age set to 69&lt;br /&gt;
| [http://www.csmonitor.com/Business/Latest-News-Wires/2010/1112/Retirement-age-at-69-Deficit-plan-hits-Social-Security Retirement age at 69? Deficit plan hits Social Security]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| rowspan=&amp;quot;2&amp;quot;| 2076&lt;br /&gt;
| Average scientific paper has more than 24 authors&lt;br /&gt;
| [https://doclib.uhasselt.be/dspace/bitstream/1942/871/1/yitzhaki373.PDF Multiple Authorship in Biochemistry and Other Fields] (PDF)&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| Social Security trust fund exhausted&lt;br /&gt;
| {{w|Social Security (United States)|Social Security}}&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| 2078&lt;br /&gt;
| Newspapers become obsolete and die out&lt;br /&gt;
| The same prediction was made for 2017 and 2022.  Even when most prognosticators agree that something will happen, there can still be much disagreement about ''when'' it will happen.&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| rowspan=&amp;quot;4&amp;quot;| 2079&lt;br /&gt;
| US debt reaches 716% of GDP&lt;br /&gt;
| {{w|US Debt}}&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| Lodgepole pines disappear from Northwest&lt;br /&gt;
| [http://oregonstate.edu/ua/ncs/archives/2011/feb/climate-change-causing-demise-lodgepole-pine-western-north-america Climate change causing demise of lodgepole pine in western North America]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| Floods commonplace&lt;br /&gt;
| [http://www.sciencedaily.com/releases/2009/01/090108101627.htm Floods To Become Commonplace By 2080]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| Religion marginalized&lt;br /&gt;
| http://www.bbc.com/news/uk-11347073&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| rowspan=&amp;quot;2&amp;quot;| 2080&lt;br /&gt;
| Federal spending reaches 70% of GDP&lt;br /&gt;
| [http://crfb.org/sites/default/files/our_debt_problems_are_far_from_solved_updated_2.pdf Our debt problems are far from solved] (PDF)&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| UK population doubles&lt;br /&gt;
| [http://forums.canadiancontent.net/international-politics/69603-britains-population-hit-110-million.html Britain's population to hit 110 million]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| 2082&lt;br /&gt;
| World population declines to one billion&lt;br /&gt;
| [http://www.paulchefurka.ca/Population.html Population: The Elephant in the Room]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| 2084&lt;br /&gt;
| Robot policemen introduced&lt;br /&gt;
| [http://www.thetechherald.com/articles/Robotic-cops-set-to-stamp-out-crime-by-2084 Robotic cops set to stamp out crime by 2084]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| 2085&lt;br /&gt;
| US deficit reaches 62% of GDP&lt;br /&gt;
| [http://moneybob.com/2010/06/28/paul-krugman-throws-in-towel-says-were-headed-for-another-depression/ Paul Krugman Throws In Towel, Says We’re Headed For Another Depression]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| 2088&lt;br /&gt;
| Japan becomes all-robot country&lt;br /&gt;
| [http://www.theretributioners.tv/erics-blog/2009/11/25/-japan-to-become-all-robot-country-by-2088.html Japan To Become All Robot Country By 2088]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| 2089&lt;br /&gt;
| World halts fossil fuel use&lt;br /&gt;
| {{w|Fossil Fuels}}&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| rowspan=&amp;quot;2&amp;quot;| 2090&lt;br /&gt;
| Global warming hits 7&amp;amp;nbsp;°C &lt;br /&gt;
| [http://www.reportingclimatescience.com/news-stories/article/models-warn-of-7c-dangerous-climate-change-by-2090.html Models warn of 7C dangerous climate change by 2090]. Climate change, especially global warming, is a [[:Category:Climate change|recurring theme]] in xkcd.&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| Global warming hits 4&amp;amp;nbsp;°C&lt;br /&gt;
| Summarized [http://www.global-warming-forecasts.com/2090-climate-change-global-warming-2090.php here]. In reference to Andy Bowers, “Analysis: Scientists say global warming could affect California's drinking water supply,” NPR All Things Considered, June 22, 2001&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| rowspan=&amp;quot;11&amp;quot;| 2100&lt;br /&gt;
| Global warming around 5-7&amp;amp;nbsp;°C&lt;br /&gt;
| [http://grist.org/article/bau-fd/ Hadley Center study warns of ‘catastrophic’ 5-7°C warming by 2100 on current emissions path]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| Sea levels have risen by a meter or more&lt;br /&gt;
| {{w|Future sea level}}&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| Joshua trees nearly extinct&lt;br /&gt;
| [http://news.discovery.com/earth/joshua-trees-climate-change-110325.htm Joshua Trees Nearly Wiped Out by 2100?]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| Earth's climate resembles that of the Cretaceous&lt;br /&gt;
| [http://www.pnas.org/content/107/2/576 Atmospheric CO2 concentrations during ancient greenhouse climates were similar to those predicted for A.D. 2100]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| Germany tropical&lt;br /&gt;
| [http://www.spiegel.de/international/spiegel/climate-change-predictions-a-tropical-germany-by-2100-a-463378.html Climate Change Predictions: A Tropical Germany by 2100?]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| Emperor penguins extinct&lt;br /&gt;
| [http://news.bbc.co.uk/2/hi/science/nature/7851276.stm Emperor penguins face extinction]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| Arctic permafrost thaws&lt;br /&gt;
| [http://www.scientificamerican.com/article/surface-permafrost-could/ Surface Permafrost Could Disappear by 2100]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| Rising seas flood coastal cities&lt;br /&gt;
| [http://uanews.org/story/rising-seas-will-affect-major-us-coastal-cities-2100 Rising Seas Will Affect Major U.S. Coastal Cities by 2100]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| Rain forests mostly gone due to climatic shifts&lt;br /&gt;
| [http://www.dailykos.com/story/2010/08/06/890970/-Massive-Loss-of-Rainforest-Species-by-2100-eKos-Earthship-Friday Massive Loss of Rainforest Species by 2100]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| All coral reefs gone &lt;br /&gt;
| [http://planetsave.com/2010/10/15/coral-reefs-gone-by-2100/ Coral Reefs Gone by 2100?]&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| Gillette introduces 14-bladed razor&lt;br /&gt;
| Each iteration of the Gillette line of safety razors has one more blade than the previous one. MadTV has also [http://www.youtube.com/watch?v=2FAP8o5ZEo0 parodied] this. Over five years before MadTV did so, the Australian comedy group the D-Generation parodied the first two-bladed razor as the [https://www.youtube.com/watch?v=YleuLyCUx28 Gillette 3000] with 16 blades.&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| 2101&lt;br /&gt;
| WAR WAS BEGINNING&lt;br /&gt;
| References {{w|Zero Wing}}, a 1989 Japanese computer game set in 2101, famous for poorly translated English and the source for &amp;quot;{{w|All your base are belong to us}}&amp;quot;.&lt;br /&gt;
|&lt;br /&gt;
|}&lt;br /&gt;
&amp;lt;references/&amp;gt;&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
&lt;br /&gt;
:&amp;lt;big&amp;gt;'''THE FUTURE'''&amp;lt;/big&amp;gt;&lt;br /&gt;
:'''According to Google search results'''&lt;br /&gt;
:Events for each year determined by the first page of Google search results for the phrases:&lt;br /&gt;
:&amp;lt;small&amp;gt;&amp;quot;By &amp;lt;year&amp;gt;&amp;quot; &amp;quot;In year&amp;quot;&amp;lt;/small&amp;gt;&lt;br /&gt;
:&amp;lt;small&amp;gt;&amp;quot;By the year &amp;lt;year&amp;gt;&amp;quot; &amp;quot;In the year &amp;lt;year&amp;gt;&amp;quot;&amp;lt;/small&amp;gt;&lt;br /&gt;
:&amp;lt;small&amp;gt;&amp;quot;Will * by the year &amp;lt;year&amp;gt;&amp;quot; &amp;quot;Will * in the year &amp;lt;year&amp;gt;&amp;quot;&amp;lt;/small&amp;gt;&lt;br /&gt;
:&amp;lt;small&amp;gt;&amp;quot;In &amp;lt;year&amp;gt;, * will&amp;quot; &amp;quot;By &amp;lt;year&amp;gt;, * will&amp;quot;&amp;lt;/small&amp;gt;&lt;br /&gt;
:&lt;br /&gt;
:;2012&lt;br /&gt;
::World population reaches 7 billion&lt;br /&gt;
::Flying cars reach market&lt;br /&gt;
::Canada cuts greenhouse emissions to 6% below 1990 levels as per Kyoto&lt;br /&gt;
::Apocalypse occurs&lt;br /&gt;
:;2013&lt;br /&gt;
::National debt paid off through President Clinton's plans&lt;br /&gt;
::Microchipping of all Americans begins&lt;br /&gt;
::Homelessness ended in Massachusetts&lt;br /&gt;
::Health care reform law repealed&lt;br /&gt;
:;2014&lt;br /&gt;
::US leaves Afghanistan&lt;br /&gt;
::GNU/Linux becomes dominant OS&lt;br /&gt;
:;2015&lt;br /&gt;
::New Horizons reaches Pluto&lt;br /&gt;
::Health care law causes hyperinflation&lt;br /&gt;
::192 UN member nations achieve millennium development goals:&lt;br /&gt;
::*Extreme poverty and hunger eradicated&lt;br /&gt;
::*Universal primary education implemented&lt;br /&gt;
::*Women empowered, gender equality reached&lt;br /&gt;
::*Environmental stability ensured&lt;br /&gt;
:;2016&lt;br /&gt;
::Baby boomers begin turning 65&lt;br /&gt;
::Android takes 38% of the smartphone market&lt;br /&gt;
::Android takes 45% of the smartphone market&lt;br /&gt;
::Windows Phone overtakes iOS in smartphones&lt;br /&gt;
:;2017&lt;br /&gt;
::China completes unmanned Lunar sample-return mission&lt;br /&gt;
::Social Security stops running surplus&lt;br /&gt;
::US budget balanced&lt;br /&gt;
::Newspapers become obsolete and die out&lt;br /&gt;
::Cosmetic surgery doubles&lt;br /&gt;
:;2018&lt;br /&gt;
::Social Security stops running surplus&lt;br /&gt;
::Jesus returns to Earth&lt;br /&gt;
:;2019&lt;br /&gt;
::Social Security stops running surplus&lt;br /&gt;
::Every baby has genes mapped at birth&lt;br /&gt;
:;2020&lt;br /&gt;
::Solar power becomes cheaper than fossil fuels&lt;br /&gt;
::Keyboards and mice become obsolete&lt;br /&gt;
::New Tappan Zee bridge constructed&lt;br /&gt;
:;2021&lt;br /&gt;
::US debt reaches 97% of GDP&lt;br /&gt;
::US unemployment falls to 2.8%&lt;br /&gt;
::Restored caliphate unifies Middle East&lt;br /&gt;
::Lake Mead evaporates&lt;br /&gt;
:;2022&lt;br /&gt;
::Kilimanjaro snow-free&lt;br /&gt;
::HTML 5 finished&lt;br /&gt;
::Newspapers become obsolete and die out&lt;br /&gt;
:;2023&lt;br /&gt;
::Jesus returns to Earth (again)&lt;br /&gt;
::US debt passes 100% of GDP&lt;br /&gt;
::All unprotected ancient forests gone from Pacific Northwest&lt;br /&gt;
:;2024&lt;br /&gt;
::Atlantis begins to reappear&lt;br /&gt;
::Orangutans extinct in wild&lt;br /&gt;
::China lands men and women on the moon&lt;br /&gt;
::NASA sets up permanent moon base&lt;br /&gt;
::Female professionals pass males in pay&lt;br /&gt;
:;2025&lt;br /&gt;
::World population reaches 8 billion&lt;br /&gt;
::Two billion people face water shortages&lt;br /&gt;
::62 MPG cars introduced&lt;br /&gt;
::US power fades&lt;br /&gt;
:;2026&lt;br /&gt;
::Atlantis emerges completely&lt;br /&gt;
::Rock Bands die out&lt;br /&gt;
::US debt paid off&lt;br /&gt;
::Car accidents cease&lt;br /&gt;
::West coast falls into ocean&lt;br /&gt;
:;2027&lt;br /&gt;
::Japan introduces new fastest maglev train&lt;br /&gt;
::Lyndon Larouche-planned Mars colony established&lt;br /&gt;
::Social Security stops running surplus&lt;br /&gt;
:;2028&lt;br /&gt;
::Tobacco outlawed&lt;br /&gt;
::40% of coral reefs gone&lt;br /&gt;
::US debt paid off&lt;br /&gt;
::Social Security stops running surplus&lt;br /&gt;
:;2029&lt;br /&gt;
::Social Security trust fund exhausted&lt;br /&gt;
::Computers pass the Turing Test&lt;br /&gt;
::Aging reversed&lt;br /&gt;
::Wikipedia reaches 30 million articles&lt;br /&gt;
:;2030&lt;br /&gt;
::Half of Amazon rain forest lost to logging&lt;br /&gt;
::Cancer deaths double from 2008 levels&lt;br /&gt;
::Arctic ice-free in summer&lt;br /&gt;
:;2031&lt;br /&gt;
::Computers controlled by thought&lt;br /&gt;
::Realtors replaced by technology&lt;br /&gt;
::Social Security trust fund exhausted&lt;br /&gt;
:;2032&lt;br /&gt;
::&amp;quot;Big One&amp;quot; hits San Francisco&lt;br /&gt;
::US elects first married lesbian president&lt;br /&gt;
::Entire world converted to Christianity&lt;br /&gt;
:;2033&lt;br /&gt;
::Kilimanjaro ice disappears&lt;br /&gt;
::India becomes superpower&lt;br /&gt;
::Europe reaches Mars&lt;br /&gt;
:;2034&lt;br /&gt;
::US diabetes cases double, treatment costs triple&lt;br /&gt;
::US builds autonomous robot army&lt;br /&gt;
:;2035&lt;br /&gt;
::80% of America's energy comes from renewable sources&lt;br /&gt;
::Himalayan glaciers down 80% in size&lt;br /&gt;
::Arctic sea lane opens&lt;br /&gt;
:;2036&lt;br /&gt;
::80% of US has access to high-speed rail&lt;br /&gt;
::Asteroid Apophis hits/misses Earth&lt;br /&gt;
:;2037&lt;br /&gt;
::Arctic ice-free in September&lt;br /&gt;
::Social Security trust fund exhausted&lt;br /&gt;
:;2038&lt;br /&gt;
::32-bit timestamps role over, causing Y2K-level chaos&lt;br /&gt;
::&amp;quot;Big One&amp;quot; hits California&lt;br /&gt;
:;2039&lt;br /&gt;
::US population hits 400 million&lt;br /&gt;
::Severe heat waves become commonplace&lt;br /&gt;
::Scientology becomes majority religion in US&lt;br /&gt;
:;2040&lt;br /&gt;
::Arctic summers ice-free&lt;br /&gt;
::Nanotechnology makes humans immortal&lt;br /&gt;
:;2041&lt;br /&gt;
::Social Security trust fund exhausted&lt;br /&gt;
:;2042&lt;br /&gt;
:;2043&lt;br /&gt;
::World population passes 9 billion&lt;br /&gt;
:;2044&lt;br /&gt;
::Mankind genetically engineered to be happy&lt;br /&gt;
::Childhood obesity reaches 100%&lt;br /&gt;
:;2045&lt;br /&gt;
::Humans and machines merge&lt;br /&gt;
:;2046&lt;br /&gt;
::World's natural resources depleted&lt;br /&gt;
:;2047&lt;br /&gt;
::World ruled by banks and corporations&lt;br /&gt;
::Tobacco industry fails&lt;br /&gt;
::US begins using autonomous attack drones&lt;br /&gt;
:;2048&lt;br /&gt;
::Salt-water fish extinct from overfishing&lt;br /&gt;
::Unisex bathing suits cover body from shoulder to ankle&lt;br /&gt;
::Entire US population overweight&lt;br /&gt;
:;2049&lt;br /&gt;
::$1.000 computer exceeds computational ability of humanity&lt;br /&gt;
::Singularity occurs&lt;br /&gt;
::Fishing industry collapses&lt;br /&gt;
:;2050&lt;br /&gt;
::80% of Earth's population lives in urban centers&lt;br /&gt;
::China controls space&lt;br /&gt;
::Sex with robots possible&lt;br /&gt;
::Cars banned from European cities&lt;br /&gt;
::One million species extinct from climate change&lt;br /&gt;
:;2051&lt;br /&gt;
::Atmosphere escapes into space&lt;br /&gt;
:;2052&lt;br /&gt;
::Medicare, Medicaid, and Social Security spending exceed total US revenue&lt;br /&gt;
:;2053&lt;br /&gt;
::US budget balanced&lt;br /&gt;
::Majority of Americans in prison&lt;br /&gt;
::Cars driven by dogs&lt;br /&gt;
:;2054&lt;br /&gt;
::Hunger becomes unimaginable global problem&lt;br /&gt;
:;2055&lt;br /&gt;
::Atmospheric CO2 doubled&lt;br /&gt;
::Oil runs out&lt;br /&gt;
::Copper, tin, lead, gold, and nickel all exhausted&lt;br /&gt;
:;2056&lt;br /&gt;
::RFID-tagged driverless cars&lt;br /&gt;
::Robots given same rights as humans&lt;br /&gt;
:;2057&lt;br /&gt;
::150 Japanese settlers on Mars&lt;br /&gt;
::Colorado River runs dry&lt;br /&gt;
:;2058&lt;br /&gt;
::Smoking ends in New Zealand&lt;br /&gt;
:;2059&lt;br /&gt;
::Humans have domesticated robots&lt;br /&gt;
:;2060&lt;br /&gt;
::Human race lives in peace&lt;br /&gt;
::Extreme droughts across much of Earth&lt;br /&gt;
::Global temperature rise reaches 4°C&lt;br /&gt;
::Oil runs out again&lt;br /&gt;
:;2061&lt;br /&gt;
::Halley's comet returns&lt;br /&gt;
:;2062&lt;br /&gt;
::Uganda hosts World Cup&lt;br /&gt;
::The Jetsons&lt;br /&gt;
:;2063&lt;br /&gt;
::First human clones reach adulthood&lt;br /&gt;
::Population of Moon reaches 100,000&lt;br /&gt;
::Population of Mars reaches 10,000&lt;br /&gt;
::Spacecraft exceed speed of light&lt;br /&gt;
:;2064&lt;br /&gt;
::Clean Air Act finishes reducing haze in national parks to natural levels&lt;br /&gt;
:;2065&lt;br /&gt;
::Last coral reefs die out&lt;br /&gt;
::Chernobyl cleanup complete&lt;br /&gt;
:;2066&lt;br /&gt;
::Cyprus achieves its goal&lt;br /&gt;
:;2067&lt;br /&gt;
::Americans live in domed cities and watch 3D TV&lt;br /&gt;
::Redheads go extinct&lt;br /&gt;
:;2068&lt;br /&gt;
::Ozone hole over Antarctic finishes recovering&lt;br /&gt;
::Lord Jesus rules the Earth from Throne in Jerusalem.&lt;br /&gt;
::Entire world population gay due to chemicals in the water&lt;br /&gt;
:;2069&lt;br /&gt;
::Public masturbation legalized&lt;br /&gt;
:;2070&lt;br /&gt;
::World population peaks&lt;br /&gt;
::City-scale flooding disasters&lt;br /&gt;
::60% of world's energy comes from renewable sources&lt;br /&gt;
:;2071&lt;br /&gt;
::Europe's temperatures rise by 3°C&lt;br /&gt;
::World summer temperatures rise by 5°C&lt;br /&gt;
:;2072&lt;br /&gt;
::US retirement age is set to 75&lt;br /&gt;
:;2073&lt;br /&gt;
::Oceans do not rise one foot&lt;br /&gt;
:;2074&lt;br /&gt;
::Number of 100-year-olds reaches one million&lt;br /&gt;
::Supertyphoons hit Japan&lt;br /&gt;
:;2075&lt;br /&gt;
::US retirement age set to 69&lt;br /&gt;
:;2076&lt;br /&gt;
::Average scientific paper has more than 24 authors&lt;br /&gt;
::Social Security trust fund exhausted&lt;br /&gt;
:;2077&lt;br /&gt;
:;2078&lt;br /&gt;
::Newspapers become obsolete and die out&lt;br /&gt;
:;2079&lt;br /&gt;
::US debt reaches 716% of GDP&lt;br /&gt;
::Lodgepole pines disappear from Northwest&lt;br /&gt;
::Floods commonplace&lt;br /&gt;
::Religion marginalized&lt;br /&gt;
:;2080&lt;br /&gt;
::Federal spending reaches 70% of GDP&lt;br /&gt;
::UK population doubles&lt;br /&gt;
:;2081&lt;br /&gt;
:;2082&lt;br /&gt;
::World population declines to one billion&lt;br /&gt;
:;2083&lt;br /&gt;
:;2084&lt;br /&gt;
::Robot policemen introduced&lt;br /&gt;
:;2085&lt;br /&gt;
::US deficit reaches 62% of GDP&lt;br /&gt;
:;2086&lt;br /&gt;
:;2087&lt;br /&gt;
:;2088&lt;br /&gt;
::Japan becomes all-robot country&lt;br /&gt;
:;2089&lt;br /&gt;
::World halts fossil fuel use&lt;br /&gt;
:;2090&lt;br /&gt;
::Global warming hits 7°C&lt;br /&gt;
::Global warming hits 4°C&lt;br /&gt;
:;2091&lt;br /&gt;
:;2092&lt;br /&gt;
:;2093&lt;br /&gt;
:;2094&lt;br /&gt;
:;2095&lt;br /&gt;
:;2096&lt;br /&gt;
:;2097&lt;br /&gt;
:;2098&lt;br /&gt;
:;2099&lt;br /&gt;
:;2100&lt;br /&gt;
::Global warming around 5-7°C&lt;br /&gt;
::Sea levels have risen by a meter or more&lt;br /&gt;
::Joshua trees nearly extinct&lt;br /&gt;
::Earth's climate resembles that of the Cretaceous&lt;br /&gt;
::Germany tropical&lt;br /&gt;
::Emperor penguins extinct&lt;br /&gt;
::Arctic permafrost thaws&lt;br /&gt;
::Rising seas flood coastal cities&lt;br /&gt;
::Rain forests mostly gone due to climatic shifts&lt;br /&gt;
::All coral reefs gone	&lt;br /&gt;
::Gillette introduces 14-bladed razor&lt;br /&gt;
:;2101&lt;br /&gt;
::WAR WAS BEGINNING&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;br /&gt;
&lt;br /&gt;
[[Category:Large drawings]]&lt;br /&gt;
[[Category:Timelines]]&lt;br /&gt;
[[Category:Google Search]]&lt;br /&gt;
[[Category:Climate change]]&lt;br /&gt;
[[Category:Singularity]]&lt;/div&gt;</summary>
		<author><name>162.158.91.125</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=2114:_Launch_Conditions&amp;diff=169978</id>
		<title>2114: Launch Conditions</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=2114:_Launch_Conditions&amp;diff=169978"/>
				<updated>2019-02-21T19:48:18Z</updated>
		
		<summary type="html">&lt;p&gt;162.158.91.125: added Ring of O reference&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 2114&lt;br /&gt;
| date      = February 20, 2019&lt;br /&gt;
| title     = Launch Conditions&lt;br /&gt;
| image     = launch_conditions.png&lt;br /&gt;
| titletext = Though I do think the tiny vent on one of the boosters labeled &amp;quot;O-RING&amp;quot; is in poor taste.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
{{incomplete|Created by an O-RING FAILURE. Please mention here why this explanation isn't complete. Do NOT delete this tag too soon.}}&lt;br /&gt;
&lt;br /&gt;
An image of a rocket with a progressively larger white cloud around it is shown, but no external object for scale is visible until the third panel.&lt;br /&gt;
It is then revealed to be a model or miniature when Ponytail walks into the shot.&lt;br /&gt;
&lt;br /&gt;
The dialog reveals the miniature rocket is a domestic {{w|humidifier}} appliance, using its plumes of water mist to mimic the appearance of the exhaust plume of a full-size rocket.&lt;br /&gt;
&lt;br /&gt;
Modern rocket launches are backed by a ''Sound Suppression System'' avoiding damages to the rocket itself, the payload, or humans inside. This system drops vast amounts of water into the exhaust of the rocket engines and the water vaporizes immediately. This vapor mainly interrupts the sound reflections from the ground. This reduces the sound to a level the rocket can withstand but also produces a big cloud of water mist. The cloud at the ground consists mostly of water and not the exhaust of the rocket engines. This article shows how the system works: [https://interestingengineering.com/nasa-sound-suppression-system-prevents-rocket-from-exploding NASA's Incredible Sound Suppression System Prevents Rockets from Exploding (interestingengineering.com)].&lt;br /&gt;
&lt;br /&gt;
This comic appeared the day after the death of Peter Cosgrove, who was known for photographing many Space Shuttle launches, was reported.&lt;br /&gt;
&lt;br /&gt;
The title text references the failed o-ring that led to the {{Wikipedia|Space Shuttle Challenger disaster|disintegration of the ''Challenger'' Space Shuttle}}. &lt;br /&gt;
This disaster was a focal point of controversy, which Richard Feynman played a key {{w|Rogers_Commission_Report#Role_of_Richard_Feynman|role in piercing}}.  The o-ring in question failed to expand at freezing temperatures, resulting in a leak of gas around the edges that was visible as a small vapor plume on the recording.  The launch was pushed to a day with lower temperatures than the engineers had planned for.  For the humidifier to vent the water mist from this opening is indeed in poor taste, even though the model does not resemble a shuttle.&lt;br /&gt;
Another possible, yet unlikely, explanation might be that the ring is actually a reference to the {{w|Ring_of_O|Ring of O}} a distinctive mark of BDSM practitioners.&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
{{incomplete transcript|Do NOT delete this tag too soon.}}&lt;br /&gt;
:[A rocket sits on a launch pad and the tower to the left has retracted its access arms. The engines seem to have just started firing and a small cloud at the bottom is visible.]&lt;br /&gt;
&lt;br /&gt;
:[The rocket still sits on the pad but the cloud is growing and extending to both sides on the ground.]&lt;br /&gt;
&lt;br /&gt;
:[Ponytail's head, much larger than the rocket, appears above the rocket on the right. The cloud covers the full ground and hides a bigger part of the rocket.]&lt;br /&gt;
&lt;br /&gt;
:[Zoom out. Ponytail stands behind a pedestal with a rocket model on top and the cloud is all around the bottom of the rocket and below.]&lt;br /&gt;
:Off screen: It's still pretty dry in here.&lt;br /&gt;
:Ponytail: I love the new humidifier, though.&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;br /&gt;
&lt;br /&gt;
[[Category:Comics featuring Ponytail]]&lt;br /&gt;
[[Category:Space]]&lt;/div&gt;</summary>
		<author><name>162.158.91.125</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=Talk:2111:_Opportunity_Rover&amp;diff=169587</id>
		<title>Talk:2111: Opportunity Rover</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=Talk:2111:_Opportunity_Rover&amp;diff=169587"/>
				<updated>2019-02-14T14:12:49Z</updated>
		
		<summary type="html">&lt;p&gt;162.158.91.125: &lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;&amp;lt;!--Please sign your posts with ~~~~ and don't delete this text. New comments should be added at the bottom.--&amp;gt;&lt;br /&gt;
The subject of this comic, the Opportunity Rover, is being officially declared dead today, the day the comic was released. I wonder how long this comic has been ready, waiting to eulogize the rover. [[User:Blaisepascal|Blaisepascal]] ([[User talk:Blaisepascal|talk]]) 18:03, 13 February 2019 (UTC)&lt;br /&gt;
: I'm not crying, you're crying! But seriously, I hope this one becomes a poster... one of my favorite comics in a good long while. --[[Special:Contributions/172.69.46.46|172.69.46.46]] 20:25, 13 February 2019 (UTC)&lt;br /&gt;
:: Stop slicing those onions ! [[Special:Contributions/162.158.91.125|162.158.91.125]] 14:12, 14 February 2019 (UTC)&lt;br /&gt;
: Yes, more of a paean than &amp;quot;a discussion about ... &amp;quot; the Opportunity rover, and more, it justifies a yearning for the &amp;quot;opportunity&amp;quot; in general to share the knowledge with the world. Uplifting, for me. [[User:PGilm|PGilm]] ([[User talk:PGilm|talk]]) 20:59, 13 February 2019 (UTC)&lt;br /&gt;
&lt;br /&gt;
Okay, deleting and replacing my explanation with something completely different is one thing, but deleting my comments, and the comments of those who replied to me, so that it's as if our conversation never took place? What the fuck?&lt;br /&gt;
[[Special:Contributions/162.158.106.66|162.158.106.66]] 21:26, 13 February 2019 (UTC)&lt;br /&gt;
: Why would anyone do this? Poor you.. [[User:Kazeita|Kazeita]] ([[User talk:Kazeita|talk]]) 23:51, 13 February 2019 (UTC)&lt;br /&gt;
:Maybe it's because you're an vandalistic, antisemitic, conspiracy theorist nutbar, and we don't want you here. Just sayin'. [[Special:Contributions/172.69.158.52|172.69.158.52]] 03:55, 14 February 2019 (UTC)&lt;br /&gt;
&lt;br /&gt;
The fact that the rover ran for 15 years is already magical. He was just designed to last several months (I sincerely use this surname), and people at NASA was suspecting that it may just last days. Yet he worked so hard for us. When I saw the movie about him 10 years ago, I wad SO moved. https://www.imdb.com/title/tt0436595/ All of you should watch it now. I had no idea that I would edit a wiki page about him today.&lt;br /&gt;
[[User:Kazeita|Kazeita]] ([[User talk:Kazeita|talk]]) 23:51, 13 February 2019 (UTC)&lt;br /&gt;
&lt;br /&gt;
On one hand, this feels like a subtle nod to xkcd itself. In a sense, a lot of xkcd is Randall's own journal of what he thinks of every so often, and he gets to share it with millions and millions of people.&lt;br /&gt;
On the other, &amp;quot;and here's a trench I dug with my wheel&amp;quot; makes me think that Opportunity was using time outside of its feed to slowly but surely dig out an actual 100-meter or so trench. Getting larger. And larger. Until one day, it will rival even the trenches of Earth. And on that day...'''Their''' conquest will have begun. [[Special:Contributions/172.68.78.52|172.68.78.52]] 03:33, 14 February 2019 (UTC)&lt;/div&gt;</summary>
		<author><name>162.158.91.125</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=Talk:2087:_Rocket_Launch&amp;diff=167690</id>
		<title>Talk:2087: Rocket Launch</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=Talk:2087:_Rocket_Launch&amp;diff=167690"/>
				<updated>2019-01-04T10:04:45Z</updated>
		
		<summary type="html">&lt;p&gt;162.158.91.125: &lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;&amp;lt;!--Please sign your posts with ~~~~ and don't delete this text. New comments should be added at the bottom.--&amp;gt;&lt;br /&gt;
&lt;br /&gt;
I had to fight the urge to type Care Bare [[User:Arachrah|Arachrah]] ([[User talk:Arachrah|talk]])&lt;br /&gt;
&lt;br /&gt;
This was published during the Arianespace launch livestream, between launch and satellite deployment: https://www.youtube.com/watch?v=mpHJoo0h8GQ [[User:Fabian42|Fabian42]] ([[User talk:Fabian42|talk]]) 17:11, 19 December 2018 (UTC)&lt;br /&gt;
&lt;br /&gt;
Looks like it could be an Ariane5 in the comic, it is a 3 stage. Anyone know if Max-CB is a real thing (and before I get any wisecracks, I know there aren't any Care Bears in the clouds) [[Special:Contributions/162.158.63.214|162.158.63.214]] 20:27, 19 December 2018 (UTC)&lt;br /&gt;
&lt;br /&gt;
: A search for rocketry terminology reveals that Cb stands for Ballistic Coefficient, which is a measure of the ability to coast.  It is related to both velocity and air density, which vary throughout a rocket launch, so it makes sense that there might be some point of maximum ballistic coefficient. (Note: I am not a rocket scientist, and this is clearly rocket science, so take this with a grain of salt!) [[User:Ianrbibtitlht|Ianrbibtitlht]] ([[User talk:Ianrbibtitlht|talk]]) 21:13, 19 December 2018 (UTC)&lt;br /&gt;
::That point is called &amp;quot;Max-Q&amp;quot;. Source: I've seen a lot of rocket launches recently and they always mention it, because it's the second most likely moment to have a failure (first is the launch, of course). [[User:Fabian42|Fabian42]] ([[User talk:Fabian42|talk]]) 07:28, 20 December 2018 (UTC)&lt;br /&gt;
&lt;br /&gt;
: Pontificating further, it is reasonable to conjecture that as a rocket accelerates to higher speeds, the drag from the atmosphere increases with increasing speed, but past a certain point the drag begins to decrease as the air gets thinner. This suggests there is some point somewhere during the launch sequence where aerodynamic drag reaches a maximum value - aka Max Cb. [[User:Ianrbibtitlht|Ianrbibtitlht]] ([[User talk:Ianrbibtitlht|talk]]) 21:26, 19 December 2018 (UTC)&lt;br /&gt;
&lt;br /&gt;
: Finally one I can help with! Okay, I don't think this is ballistic coefficient for several reasons: 1. Ballistic Coefficient is typically noted by the greek letter Beta, not Cb. 2. Ballistic coefficient is mass divided by drag area (drag coefficient times reference area). Basically a shape parameter. So while the mass does change over the course of the flight (burning fuel), the drag area does not. Making this a somewhat useless parameter for a launch vehicle 3. Ballistic Coefficient is typically reported as a static parameter rather than a time-varying parameter, so &amp;quot;Max ballistic coefficient&amp;quot; is a rather unusual metric (and would occur on the launch pad in any case, when mass is highest). Finally, as an aside, objects with high ballistic coefficients tend to fly through the air easily and are not influenced very much by wind (such as rocks or bullets), whereas low-beta objects can by pushed and slowed down a lot by the wind (such as balloons). [[User:Tyanderson91|Tyanderson91]] ([[User talk:Tyanderson91|talk]]) 03:17, 20 December 2018 (UTC)&lt;br /&gt;
:: For rockets with side boosters, as the one shown, drag will potentially change dramatically at each staging event; when the side boosters are jettisoned they are no longer dragging on the rocket, and it's possible that the stage will have a higher ballistic coefficient because there's less surface area and not significantly less mass. Chad[[Special:Contributions/172.68.47.84|172.68.47.84]] 10:30, 20 December 2018 (UTC)&lt;br /&gt;
&lt;br /&gt;
r/shittyspacexideas --[[Special:Contributions/173.245.52.139|173.245.52.139]] 19:53, 19 December 2018 (UTC)&lt;br /&gt;
&lt;br /&gt;
If you trace the dotted lines, it seems that the Boosters are the winners[[User:CCCVVVA|CCCVVVA]] ([[User talk:CCCVVVA|talk]]) 03:02, 20 December 2018 (UTC)&lt;br /&gt;
&lt;br /&gt;
:When I did it, I noticed that the boosters lost. After reading your comment, I traced it again and noticed that the last time they meet, when I saw them not crossing, could actually be interpreted as crossing (though it still seems to me that not crossing is more likely). Wonder if thst's purposeful confusion. [[Special:Contributions/162.158.89.223|162.158.89.223]] 01:26, 21 December 2018 (UTC)&lt;br /&gt;
&lt;br /&gt;
This was posted on the day SpaceX was supposed to launch the GPS-III-2 satellite, which may be the reason for the mention of GPS [[User:Tyanderson91|Tyanderson91]] ([[User talk:Tyanderson91|talk]])&lt;br /&gt;
&lt;br /&gt;
The max CB is clearly meant to spoof the real problem of rockets hitting birds. Since birds can't fly in the he upper part of the atmosphere, the point of highest likelihood of hitting a bird would presumably be below max-Q and not above it as in the comic. It is worth noting that there are no clouds at the altitude where max CB is shown in the comic, so it seems unlikely that any hypothetical cloud castle would be that high.&lt;br /&gt;
&lt;br /&gt;
EDIT: ok, after checking the numbers it seems like it is technically possible to encounter birds and clouds at heights above max-Q for some rockets, but the position shown in the comic still seems too high. [[User:Probably not Douglas Hofstadter|Probably not Douglas Hofstadter]] ([[User talk:Probably not Douglas Hofstadter|talk]]) 04:23, 20 December 2018 (UTC)&lt;br /&gt;
&lt;br /&gt;
I suspect &amp;quot;pursuit phase&amp;quot; refers either to [https://en.wikipedia.org/wiki/Pursuit_predation predation] or to some aspect of air warfare (either involving missiles chasing craft or craft vs. craft). [[User:Magic9mushroom|Magic9mushroom]] ([[User talk:Magic9mushroom|talk]]) 08:08, 20 December 2018 (UTC)&lt;br /&gt;
&lt;br /&gt;
I believe &amp;quot;pursuit phase&amp;quot; refers to the Domestic Violence Cycle.  There are just too many correlations. [[User:iraytrace|iraytrace]] ([[User talk:iraytrace|talk]])  (02:38 21 December 2018 (UTC)&lt;br /&gt;
:I see no reason what so ever that Randall was thinking of domestic violence, just because he called a pursuit of one rocket of another a &amp;quot;pursuit phase&amp;quot;. Guess someone has this on their mind and see it everywhere. I would delete it but I don't have the time. --[[User:Kynde|Kynde]] ([[User talk:Kynde|talk]]) 14:01, 21 December 2018 (UTC)&lt;br /&gt;
&lt;br /&gt;
::Pursuit phase or [https://en.wikipedia.org/wiki/Pursuit_guidance pursuit guidance] is something that crops up in missile guidance and ICBM interception a lot, which I think is probably more relevant here. --[[Special:Contributions/108.162.246.203|108.162.246.203]] 18:24, 21 December 2018 (UTC)&lt;br /&gt;
&lt;br /&gt;
I feel a reference to [[1133: Up Goer Five]] and 'will not go to space today' is needed, but not sure where - after dogfight? Possibly Kerbal (Care Bear?) Space Program too. [[Special:Contributions/162.158.34.178|162.158.34.178]] 15:09, 21 December 2018 (UTC)&lt;br /&gt;
&lt;br /&gt;
I think there's some kind of a theme going on with the reunified stages &amp;amp; a traditional narrative arc of rise, fall &amp;amp; redemption (or something like that..). Like it's rising from its fall to try to regain a throne or something? I'm not sure where to put it but edit it in if you agree.&lt;br /&gt;
Also not changing it, but linking Wikipedia's article on 'pursuit guidance' as a 'possible reference' is a helluva stretch, don't you think? Cool article, but I don't think it's referenced any more than 'CB Radio' or 'Q-tips' would be&lt;br /&gt;
¯\_(ツ)_/¯  --[[Special:Contributions/172.69.22.224|172.69.22.224]] 18:46, 24 December 2018 (UTC)&lt;br /&gt;
&lt;br /&gt;
The GPS disabled may also be a reference to the COCOM altitude/speed limits placed on commercial GPS units. [[Special:Contributions/162.158.63.232|162.158.63.232]] 16:22, 25 December 2018 (UTC)&lt;br /&gt;
&lt;br /&gt;
This comic can be solved by simply deleting a white space and replacing &amp;quot;a typical&amp;quot; with &amp;quot;atypical&amp;quot; [[Special:Contributions/162.158.91.125|162.158.91.125]] 10:04, 4 January 2019 (UTC)&lt;/div&gt;</summary>
		<author><name>162.158.91.125</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=2091:_Million,_Billion,_Trillion&amp;diff=167513</id>
		<title>2091: Million, Billion, Trillion</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=2091:_Million,_Billion,_Trillion&amp;diff=167513"/>
				<updated>2018-12-29T08:28:43Z</updated>
		
		<summary type="html">&lt;p&gt;162.158.91.125: /* Explanation */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 2091&lt;br /&gt;
| date      = December 28, 2018&lt;br /&gt;
| title     = Million, Billion, Trillion&lt;br /&gt;
| image     = million_billion_trillion.png&lt;br /&gt;
| titletext = You can tell most people don’t really assign an absolute meaning to these numbers because in some places and time periods, “billion” has meant 1,000x what it's meant in others, and a lot of us never even noticed.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
{{incomplete|This needs about a thousand years of rewriting, and I assume we'll want to do a chart of X and Y positions as with most chart comics. Do NOT delete this tag too soon.}}&lt;br /&gt;
Much like [[558: 1000 Times|comic 558]], this comic addresses the difficulty ordinary people have with large numbers. Though most if not all people intuitively understand the difference between one object and two objects, or one object and ten objects, or even one object and a hundred objects, as numbers increase most people's ability to innately conceive of the numbers being discussed decreases remarkably quickly. When numbers reach the millions and the billions, and especially the trillions, most people don't truly process the numbers at all, and instead conceive of them as some version of a drastically-oversimplified concept such as &amp;quot;very big.&amp;quot; Where comparing one to ten is simple, comparing &amp;quot;very big&amp;quot; to a different &amp;quot;very big&amp;quot; can prove extremely challenging, and will certainly require non-intuitive, conscious thinking.&lt;br /&gt;
&lt;br /&gt;
The comic represents this challenge by providing a graph which represents [[Randall]]'s ''intuitive'' conception of the values of various very large numbers, and said conception's misalignment with reality. Though some trends reflect the real value of the numbers on the graph, i.e. 100 million larger than 10 million larger than 1 million and 1 billion larger than 1 million, the curve is far from the linear (exponential on the log-scaled axes) path it should take, with 1 billion being intuitively understood as less than 100 million, based, presumably, on the fact, easily comprehended on an intuitive level, that '''100 is larger than 1''', and therefore the presence of 100 in 100 million places it at a higher value than the 1 in 1 billion would place the latter. In reality, of course, 1 billion is ten times larger than 100 million, but the comic deals not with actual reality, but with the perception of reality  of these numbers '''before conscious thought is applied'''. &lt;br /&gt;
&lt;br /&gt;
The most interesting parts of the graph, and the parts where the disconnect between intuition and reality becomes clearest, are the dashed sections labeled with question marks, the one between 100 million and 1 billion, the other between 100 billion and 1 trillion. Here two competing intuitive understandings compete for dominance. On the one hand, the intuitive understanding described above, with 100 trumping 1, would see the curve taking a sharp downturn. On the other hand, the path from 100 million to 1 billion is paved with such numbers as 500 million, 700 million, and 900 million, all of which would theoretically be seen intuitively as larger than 100 million, thanks to the fact that 9 is greater than 7, and 7 greater than 5, and so on, bending the curve up rather than down. These two conflicting intuitions leave Randall with no single intuitive path for the two dashed sections, leading to their dashed and questioned state.&lt;br /&gt;
&lt;br /&gt;
The comic's caption and title highlight another problem surrounding the intuitive grasping of large numbers: the flaws in the English words used for them. For instance, nothing about the word &amp;quot;million&amp;quot; suggests smallness relative to the word &amp;quot;billion&amp;quot; on an intuitive scale. This unintuitive language contributes greatly to the &amp;quot;100 trumps 1&amp;quot; intuitive fallacy described above. &lt;br /&gt;
&lt;br /&gt;
===  Long scale and short scale ===&lt;br /&gt;
&lt;br /&gt;
The title text references a classic, and highly relevant, example of a disconnect between the {{w|Long_and_short_scales|long and short scales of large numbers}}.&lt;br /&gt;
&lt;br /&gt;
For all English speakers, and for most languages, 1 '''''million''''' constitutes 1,000 thousands, or, said less ambiguously, 10^6. However, this is the last of the consensus numbers, and the definition of what should be the &amp;quot;next step&amp;quot;,1,000 million, varies depending on how each country's language evolved.&lt;br /&gt;
* In many English-speaking countries, 1,000 millions equals 1 billion , or 1000*10^6=10^9, and this convention is known as the '''short-scale'''.&lt;br /&gt;
* [https://en.oxforddictionaries.com/explore/how-many-is-a-billion/ In historical Britain] and many other countries with a language derived from French or Spanish, the &amp;quot;next step&amp;quot; may be named a thousand million, and 1 billion equals ''1 million'' millions, or 10^6*10^6=10^'''12''', with the base unit changing when you have a unit's worth multiple of the unit, known as the long-scale. (Note that this is no longer used in Britain since 1974.)&lt;br /&gt;
* In European languages where the '''long-scale''' system is used, the &amp;quot;next step&amp;quot; may be named a thousand million, or receive a name with a special suffix: the word milliard (meaning 1,000 million) is used in some form (e.g. milliard in French, Milliarde in German, milliard in Danish, milliárd in Hungarian, etc.), with the word billion defined as 1,000 milliard (or 1,000,000 million). In these languages, a billion never meant 1,000 million as it does in the short-scale system. Successive units, such as trillion, also increase by different multiples as well - by 1,000 in the short-scale system and 1,000,000 in the long-scale system.&lt;br /&gt;
&lt;br /&gt;
In other words, 1 billion objects in a country using the short-scale would be 1,000 million objects in a country using the long-scale; and at the &amp;quot;next step&amp;quot;, 1 trillion in the short-scale would be named 1 billion in the long-scale, despite the fact that the number of objects has remained the same. This difference between languages using the short-scale system and the long-scale often causes confusion when translating articles with large numbers in them, as translators sometimes fail to change between short-scale and long-scale schemes, wrongfully translating large numbers to incorrect values.&lt;br /&gt;
&lt;br /&gt;
The fact that such a staggering difference of terminology was able to exist and be almost completely unknown to many highlights Randall's point about the failure of human intuition in the discussion of extremely large numbers.&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
{{incomplete transcript|Do NOT delete this tag too soon.}}&lt;br /&gt;
&lt;br /&gt;
:[A graph with Y-axis labeled &amp;quot;Perceived size of number&amp;quot; and X-axis labeled &amp;quot;Actual size of number (log scale)&amp;quot;.]&lt;br /&gt;
:[The line graph shows points that are labeled with numbers from &amp;quot;1 million&amp;quot; to &amp;quot;100 trillion&amp;quot;. The perceived size increases otherwise, but decreases between 100 million and 1 billion, and between 100 billion and 1 trillion. The decreases are shown as dashed lines labeled &amp;quot;?&amp;quot;. The increases and decreases in perceived size become smaller as the numbers grow in actual size.]&lt;br /&gt;
:[Caption below the panel:]&lt;br /&gt;
:Talking about large numbers is hard&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;br /&gt;
&lt;br /&gt;
[[Category:Line graphs]]&lt;/div&gt;</summary>
		<author><name>162.158.91.125</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=1098:_Star_Ratings&amp;diff=167212</id>
		<title>1098: Star Ratings</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=1098:_Star_Ratings&amp;diff=167212"/>
				<updated>2018-12-21T12:27:08Z</updated>
		
		<summary type="html">&lt;p&gt;162.158.91.125: There's only nine possibilities; half a star isn't one&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 1098&lt;br /&gt;
| date      = August 22, 2012&lt;br /&gt;
| title     = Star Ratings&lt;br /&gt;
| image     = star ratings.png&lt;br /&gt;
| titletext = I got lost and wandered into the world's creepiest cemetery, where the headstones just had names and star ratings. Freaked me out. When I got home I tried to leave the cemetery a bad review on Yelp, but as my hand hovered over the 'one star' button I felt this distant chill...&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
This comic deals with the idea that users when viewing online star ratings are usually heavily biased towards the best possible rating (five stars). As there are nine possible scores in the rating system in the comic (1 star, 1.5 stars, 2 stars...4.5 stars, and finally 5 stars), a rating of 3 out of 5 stars is supposed to represent &amp;quot;average&amp;quot; or &amp;quot;mediocre&amp;quot;. Thus, anything above 3 stars is supposed to be &amp;quot;good&amp;quot; and anything below 3 stars is &amp;quot;bad&amp;quot;. However, most people consider a four star rating to be &amp;quot;OK&amp;quot;, and everything below as &amp;quot;crap&amp;quot;. &lt;br /&gt;
&lt;br /&gt;
On one hand there is some justification for this, as ratings are more likely to be given by people who fall onto one of the extremes (either loved or hated the product) and thus there is a tendency for ratings to be skewed either high or low. Fake reviews are also a factor that often push an aggregate score higher, although this is not addressed in the comic. For this reason, no product is so perfect that every user will give it five stars - as soon as one person gives it less than five, the overall review score would drop. So the only explanation for a five star rating is that only a few users have voted, maybe only one.&lt;br /&gt;
&lt;br /&gt;
The title text may refer to the folkloric practice of attributing a feeling of a chill to someone walking on your future grave. When Randall is back home he would like to give a bad rating on {{w|Yelp}} — a corporation that operates an &amp;quot;online urban guide&amp;quot; — and hovering his hand over the 'one star' button, he was just 'walking' over the rating on his own future grave.&lt;br /&gt;
&lt;br /&gt;
Another possible explanation for the title text is that the headstones are from people that gave the cemetery low-star ratings and were then murdered, having their given ratings displayed in the headstones. This in turn would explain the chill Randall feels before clicking the one-star button.&lt;br /&gt;
&lt;br /&gt;
See also: [[937: TornadoGuard]], another comic about star ratings.&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
:Understanding online star ratings:&lt;br /&gt;
&lt;br /&gt;
:5 stars: [Has only one review]&lt;br /&gt;
:4.5 stars: Excellent&lt;br /&gt;
:4 stars: OK&lt;br /&gt;
:3.5-1 star: Crap.&lt;br /&gt;
&lt;br /&gt;
==Trivia==&lt;br /&gt;
*The image at the end of [http://what-if.xkcd.com/69/ What-If 69] references this comic in the title text.&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;br /&gt;
&lt;br /&gt;
[[Category:Charts]]&lt;br /&gt;
[[Category:Online reviews]]&lt;/div&gt;</summary>
		<author><name>162.158.91.125</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=1086:_Eyelash_Wish_Log&amp;diff=166649</id>
		<title>1086: Eyelash Wish Log</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=1086:_Eyelash_Wish_Log&amp;diff=166649"/>
				<updated>2018-12-04T16:47:44Z</updated>
		
		<summary type="html">&lt;p&gt;162.158.91.125: /* Explanation */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 1086&lt;br /&gt;
| date      = July 25, 2012&lt;br /&gt;
| title     = Eyelash Wish Log&lt;br /&gt;
| image     = eyelash wish log.png&lt;br /&gt;
| titletext = Ooh, another one. Uh... the ability to alter any coefficients of friction at will during sporting events.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
This comic is based on a common {{w|superstition}} that when someone's {{w|eyelash}} falls out, that person can make a wish on it. This comic appears to be a page from the fictitious Wish Bureau in charge of granting said wishes. And of course the wisher is [[Black Hat]] and he has quite a few wishes, most of them based on the previous wish. A common trope in fiction is that wishing for more wishes is prohibited and for many of his wishes Black Hat attempts to circumvent that.&lt;br /&gt;
&lt;br /&gt;
;January 9: That wishing on eyelashes worked&lt;br /&gt;
:This wish is pointless. If wishing on eyelashes worked, then this would do absolutely nothing (because it already works) and if it didn't then nothing would happen because wishing on eyelashes wouldn't work.&lt;br /&gt;
&lt;br /&gt;
;January 12: A pony&lt;br /&gt;
:This wish functions as a test to see whether or not previous wish worked. It can be assumed that it did, as Black Hat then continued to make additional wishes. Wishing for a pony is a stereotypical wish made by very young girls; since Black Hat is an adult man (with a very dark sense of humor), the contrast is humorous. It could also be a reference to Mr. Krabs wishing for a pony (with saddlebags full of money) on the ''SpongeBob SquarePants'' episode &amp;quot;Christmas Who?&amp;quot;.&lt;br /&gt;
&lt;br /&gt;
;January 15: Unlimited wishes&lt;br /&gt;
:This appears to have failed, due to the traditional ban on wishing for additional wishes in conventional folklore.&lt;br /&gt;
&lt;br /&gt;
;January 19: Revocation of rules prohibiting unlimited wishes&lt;br /&gt;
:An attempt to circumvent the ban in the previous wish by wishing the ban away.&lt;br /&gt;
&lt;br /&gt;
;January 20: A finite but arbitrarily large number of wishes&lt;br /&gt;
:Another attempt to circumvent the ban on unlimited wishes by asking for a number of wishes that is limited, but as large as he likes (and there are some very large finite numbers out there, such as {{w|Graham's number}}).&lt;br /&gt;
&lt;br /&gt;
;January 28: The power to dictate the rules governing wishes&lt;br /&gt;
:Yet another attempt to circumvent the ban on unlimited wishes.&lt;br /&gt;
&lt;br /&gt;
;February 5: Unlimited eyelashes&lt;br /&gt;
:This wish likely caused Black Hat to grow unlimited eyelashes, which could be quite inconvenient and painful. And, yes, one more attempt to circumvent the ban on unlimited wishes.&lt;br /&gt;
&lt;br /&gt;
;February 6: That wish-granting entities be required to interpret wishes in accordance with the intent of the wisher&lt;br /&gt;
:This wish is likely a response to the previous day's misguided wish. It's actually quite a common problem that people making wishes leave them open for misinterpretation.&lt;br /&gt;
&lt;br /&gt;
;February 8: That wish-granting entities be incapable of impatience&lt;br /&gt;
:An attempt to prevent whatever being is powerful enough to grant wishes from becoming angry with Black Hat while he tries to manipulate the system.&lt;br /&gt;
&lt;br /&gt;
;February 12 #1: Unlimited breadsticks&lt;br /&gt;
:The first wish of this day seems to be a reference to the unlimited {{w|breadsticks}} offered at {{w|Olive Garden}}.&lt;br /&gt;
&lt;br /&gt;
;February 12 #2: Veto power over others' wishes&lt;br /&gt;
:A power that could be interesting to have. It also very much fits with Black Hat's character.&lt;br /&gt;
&lt;br /&gt;
;February 19: Veto power over others' wishes and all {{w|United States Congress|congressional}} legislation&lt;br /&gt;
:An improvement of the previous wish. This would be very interesting to have indeed, especially if you are Black Hat, because you could veto any federal law, a power normally entrusted only to the {{w|President of the United States}}.&lt;br /&gt;
&lt;br /&gt;
;February 23: The power to override any veto&lt;br /&gt;
:This wish would allow Black Hat to override vetoes which in addition to the previous wish would effectively make him control the US legislature and, to some extent, also all other governing bodies.  (Notably the {{w|United Nations|UN}}, where the veto powers wielded by the five {{w|permanent members of the Security Council}} cannot be overridden and can have large impacts on global politics.) Note that it will not allow him to turn laws off (veto them) and on again (override the veto) at any moment, as once a bill becomes law it cannot be vetoed.  Without the ability to propose legislation, Black Hat's powers are still limited. The wish may also refer back to the February 19 wish: by granting himself veto power over wishes, Black Hat just made vetoes more powerful than wishes; now he is trying to control other people's vetoes as well, lest they one-up him.&lt;br /&gt;
&lt;br /&gt;
;February 27: The power to see where any {{w|URL shortener|shortened URL}} goes without clicking&lt;br /&gt;
:This wish relates to a common practice especially in tweets or other short length media where full-length meaningful web addresses such as &amp;lt;tt&amp;gt;www.somewhere.com/articles/specificdate/title-of-the-page.html&amp;lt;/tt&amp;gt; would not be feasible. So a more compressed but nonsensical string of seemingly random characters is used which links to a link of the full text address. This creates some problems for people who are security or privacy conscious and prefer to be informed beforehand where they will be traveling on the Internet. The use of shortened URLs is also central to many types of {{w|Rickrolling|trolls or practical jokes}} (see [https://bit.ly/IqT6zt &amp;lt;tt&amp;gt;bit.ly/IqT6zt&amp;lt;/tt&amp;gt;] for an example), by directing someone to a different location than the link would initially suggest. Thus Black Hat might be wishing to be able to tell where the links go for the purpose of avoiding this sort of trolling.&lt;br /&gt;
&lt;br /&gt;
;February 29: The power to control the direction news anchors are looking while they talk&lt;br /&gt;
:This wish likely appeals to Black Hat's mischievous side, allowing him to cause news anchors to look at the wrong camera during live broadcast. Repeatedly switching to the incorrect camera would cause havoc in the studio. Additionally, Black Hat may also attempt to get a news anchor fired by having them stare where they should not such as a female anchor's breasts.&lt;br /&gt;
&lt;br /&gt;
;March 7: The power to introduce arbitrary error into Nate Silver's predictions&lt;br /&gt;
:A reference to {{w|Nate Silver}}, who is a former writer for {{w|Baseball Prospectus}} working on predicting baseball players' stats and now writes for ''{{w|Five Thirty Eight}}'' in which he predicts the outcome of elections based on polling data. This would grant Black Hat the power to influence the result of elections. This would tighten the Black Hat's control of the US even more.&lt;br /&gt;
&lt;br /&gt;
;March 15: A house of stairs&lt;br /&gt;
:This wish refers to the {{w|lithograph}} ''{{w|House of Stairs}}'' by {{w|M. C. Escher}}, or perhaps another of his lithographs, ''{{w|Relativity (M. C. Escher)|Relativity}}''.&lt;br /&gt;
&lt;br /&gt;
;March 23: A universe which is a replica of this one sans rules against meta-wishes&lt;br /&gt;
:Another attempt to circumvent the rules against wishing for more wishes by creating a {{w|parallel universe}} without such rules.&lt;br /&gt;
&lt;br /&gt;
;March 29: Free transportation to and from that universe&lt;br /&gt;
:While the previous wish may have worked, Black Hat notes a problem with it: he is still in our universe with no way to get to his new one.&lt;br /&gt;
&lt;br /&gt;
;April 2: A clear explanation of how wish rules are structured and enforced&lt;br /&gt;
:It appears that one or both of the previous two wishes failed, so Black Hat tries to discover exactly what is offending the Bureau. Having clear rules and how they work helps anyone finding loopholes in them.&lt;br /&gt;
&lt;br /&gt;
;April 7: The power to banish people into the TV show they are talking about&lt;br /&gt;
:Black hat is obviously fed up of hearing people talking about certain TV shows, and would like to be able to banish them into the show, thus prevent him having to listen to those people. It would be quite horrifying for the person getting banished.&lt;br /&gt;
&lt;br /&gt;
;April 8: Zero wishes&lt;br /&gt;
:An attempt to hack the wish-granting system by using a quite common vulnerability in input validation: an unexpected value. There may be multiple vectors this can work:&lt;br /&gt;
:* in many computer systems, 0 is reserved for unlimited or undefined&lt;br /&gt;
:* the number may be used as a divisor in some equation and this will make the system {{w|divide by zero}} and probably crash&lt;br /&gt;
:* there also may be an assertion like &amp;quot;&amp;lt;tt&amp;gt;number of wishes granted == 1&amp;lt;/tt&amp;gt;&amp;quot; which would fail, again crashing the system&lt;br /&gt;
:* similarly, if viewed as a computer system, it is possible that the wish decrement (subtracting 1 from the number of remaining wishes) is performed ''after'' the wish is granted, thus resulting in either &amp;amp;minus;1 wishes (another common placeholder for unlimited numbers), or an {{w|integer overflow}} if the wish counter is stored as an unsigned integer; the overflow can result in an exception, otherwise &amp;amp;minus;1 becomes represented as one less than the size of the integer – basically, an extremely large number.&lt;br /&gt;
:However it seems the eyelash wish-granting system does proper input validation on zero because it did not crash or grant unlimited wishes&lt;br /&gt;
:This wish may also be a reversal of the January 9 wish. Black Hat is attempting to win his game by introducing a {{w|logical contradiction}}: if he gets &amp;quot;zero wishes&amp;quot;, this is one wish granted; however, if it is not granted, then, de facto, he will have been granted zero wishes. This is a common technique used in logical proofs to show that an earlier assumption does not hold (in this case, the possibility of eyelash wishing to work).&lt;br /&gt;
&lt;br /&gt;
;April 15: Veto power over clocks&lt;br /&gt;
:Midnight, April 15 is the deadline for filing income tax returns in the United States.&lt;br /&gt;
:It may also be that Black Hat, now in control of all human legislation, is attempting to extend this to further control also rules of nature – in this case: time. The strange wording is likely to be due to Black Hat having consulted with the wish-hacking manual he acquired April 2.&lt;br /&gt;
&lt;br /&gt;
;April 22: A Pokéball that works on strangers' pets&lt;br /&gt;
:A reference to the {{w|Pokémon}} series of video games. A Pokéball can be thrown at a Pokémon (or in this case, a pet that the Pokéball thrower finds either annoying or cute) to capture it and achieve ownership of it. Unless cheats are used, Pokéballs cannot be used on Pokémon owned by other people in the Pokémon games. Many players wish to obtain the often high-level Pokémon of NPCs, and Black Hat may also be interested in pranking other players by stealing their powerful Pokémon. This was later revealed to be one of Randall's wishes in the title text of [[1705: Pokémon Go]].&lt;br /&gt;
&lt;br /&gt;
The title text is yet another mischievous wish. The coefficients of friction, though usually not noticed as they are unchanging, are all-important when performing physical activities — imagine trying to play hockey on a field of sandpaper or sprinting over a sheet of ice.  In addition to the difficulty going where you want or getting any balls that might be in play where you want them to go in a changing friction environment, angular momentum would also be very difficult to control.&lt;br /&gt;
&lt;br /&gt;
Note that when Black Hat makes meta-wishes no follow-up wishes are logged. Since the meta-wishes failed, no valid eyelash wish condition existed and the illegal test wishes were not logged in the eyelash wish log.&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
:{|&lt;br /&gt;
! align=&amp;quot;left&amp;quot; colspan=&amp;quot;2&amp;quot; |&amp;lt;font size=&amp;quot;+1&amp;quot;&amp;gt;Eyelash Wish Log&amp;lt;/font&amp;gt;&lt;br /&gt;
|-style=&amp;quot;color: gray;&amp;quot;&lt;br /&gt;
|&lt;br /&gt;
|align=&amp;quot;right&amp;quot;|Wish bureau ID#:&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|align=&amp;quot;right&amp;quot;|21118378&lt;br /&gt;
|-style=&amp;quot;color: gray;&amp;quot;&lt;br /&gt;
|&lt;br /&gt;
|align=&amp;quot;right&amp;quot;|Date range:&lt;br /&gt;
|-&lt;br /&gt;
|align=&amp;quot;right&amp;quot;|Jan-Apr 2012&lt;br /&gt;
|-&lt;br /&gt;
|}&lt;br /&gt;
:[a picture of Black Hat is above text saying Wisher]&lt;br /&gt;
:{|&lt;br /&gt;
!align=&amp;quot;left&amp;quot; width=&amp;quot;50px&amp;quot;|Date&lt;br /&gt;
!align=&amp;quot;left&amp;quot;|Wish&lt;br /&gt;
|-&lt;br /&gt;
|Jan 09&lt;br /&gt;
|That wishing on eyelashes worked&lt;br /&gt;
|-&lt;br /&gt;
|Jan 12&lt;br /&gt;
|A pony&lt;br /&gt;
|-&lt;br /&gt;
|Jan 15&lt;br /&gt;
|Unlimited wishes&lt;br /&gt;
|-&lt;br /&gt;
|Jan 19&lt;br /&gt;
|Revocation of rules prohibiting unlimited wishes&lt;br /&gt;
|-&lt;br /&gt;
|Jan 20&lt;br /&gt;
|A finite but arbitrarily large number of wishes&lt;br /&gt;
|-&lt;br /&gt;
|Jan 28&lt;br /&gt;
|The power to dictate the rules governing wishes&lt;br /&gt;
|-&lt;br /&gt;
|Feb 05&lt;br /&gt;
|Unlimited eyelashes&lt;br /&gt;
|-&lt;br /&gt;
|Feb 06&lt;br /&gt;
|That wish-granting entities be required to interpret wishes in&amp;lt;br&amp;gt;accordance with the intent of the wisher&lt;br /&gt;
|-&lt;br /&gt;
|Feb 08&lt;br /&gt;
|That wish-granting entities be incapable of impatience&lt;br /&gt;
|-&lt;br /&gt;
|Feb 12&lt;br /&gt;
|Unlimited breadsticks&lt;br /&gt;
|-&lt;br /&gt;
|Feb 12&lt;br /&gt;
|Veto power over others' wishes&lt;br /&gt;
|-&lt;br /&gt;
|Feb 19&lt;br /&gt;
|Veto power over others' wishes and all congressional legislation&lt;br /&gt;
|-&lt;br /&gt;
|Feb 23&lt;br /&gt;
|The power to override any veto&lt;br /&gt;
|-&lt;br /&gt;
|Feb 27&lt;br /&gt;
|The power to see where any shortened URL goes without clicking&lt;br /&gt;
|-&lt;br /&gt;
|Feb 29&lt;br /&gt;
|The power to control the direction news anchors are looking while they talk&lt;br /&gt;
|-&lt;br /&gt;
|Mar 07&lt;br /&gt;
|The power to introduce arbitrary error into Nate Silver's predictions&lt;br /&gt;
|-&lt;br /&gt;
|Mar 15&lt;br /&gt;
|A house of stairs&lt;br /&gt;
|-&lt;br /&gt;
|Mar 23&lt;br /&gt;
|A universe which is a replica of this one sans rules against meta-wishes&lt;br /&gt;
|-&lt;br /&gt;
|Mar 29&lt;br /&gt;
|Free transportation to and from that universe&lt;br /&gt;
|-&lt;br /&gt;
|Apr 02&lt;br /&gt;
|A clear explanation of how wish rules are structured and enforced&lt;br /&gt;
|-&lt;br /&gt;
|Apr 07&lt;br /&gt;
|The power to banish people into the TV show they're talking about&lt;br /&gt;
|-&lt;br /&gt;
|Apr 08&lt;br /&gt;
|Zero wishes&lt;br /&gt;
|-&lt;br /&gt;
|Apr 15&lt;br /&gt;
|Veto power over clocks&lt;br /&gt;
|-&lt;br /&gt;
|Apr 22&lt;br /&gt;
|A Pokéball that works on strangers' pets&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
{{Comic discussion}}&lt;br /&gt;
&lt;br /&gt;
[[Category:Comics featuring Black Hat]]&lt;br /&gt;
[[Category:Comics featuring Nate Silver]]&lt;br /&gt;
[[Category:Pokémon]]&lt;br /&gt;
[[Category:Time]]&lt;br /&gt;
[[Category:Animals]]&lt;br /&gt;
[[Category:News anchor]]&lt;br /&gt;
[[Category:Video games]]&lt;/div&gt;</summary>
		<author><name>162.158.91.125</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=1086:_Eyelash_Wish_Log&amp;diff=166648</id>
		<title>1086: Eyelash Wish Log</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=1086:_Eyelash_Wish_Log&amp;diff=166648"/>
				<updated>2018-12-04T16:45:31Z</updated>
		
		<summary type="html">&lt;p&gt;162.158.91.125: /* Explanation */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 1086&lt;br /&gt;
| date      = July 25, 2012&lt;br /&gt;
| title     = Eyelash Wish Log&lt;br /&gt;
| image     = eyelash wish log.png&lt;br /&gt;
| titletext = Ooh, another one. Uh... the ability to alter any coefficients of friction at will during sporting events.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
This comic is based on a common {{w|superstition}} that when someone's {{w|eyelash}} falls out, that person can make a wish on it. This comic appears to be a page from the fictitious Wish Bureau in charge of granting said wishes. And of course the wisher is [[Black Hat]] and he has quite a few wishes, most of them based on the previous wish. A common trope in fiction is that wishing for more wishes is prohibited and for many of his wishes Black Hat attempts to circumvent that.&lt;br /&gt;
&lt;br /&gt;
;January 9: That wishing on eyelashes worked&lt;br /&gt;
:This wish is pointless. If wishing on eyelashes worked, then this would do absolutely nothing (because it already works) and if it didn't then nothing would happen because wishing on eyelashes wouldn't work.&lt;br /&gt;
&lt;br /&gt;
;January 12: A pony&lt;br /&gt;
:This wish functions as a test to see whether or not previous wish worked. It can be assumed that it did, as Black Hat then continued to make additional wishes. Wishing for a pony is a stereotypical wish made by very young girls; since Black Hat is an adult man (with a very dark sense of humor), the contrast is humorous. It could also be a reference to Mr. Krabs wishing for a pony (with saddlebags full of money) on the ''SpongeBob SquarePants'' episode &amp;quot;Christmas Who?&amp;quot;.&lt;br /&gt;
&lt;br /&gt;
;January 15: Unlimited wishes&lt;br /&gt;
:This appears to have failed, due to the traditional ban on wishing for additional wishes in conventional folklore.&lt;br /&gt;
&lt;br /&gt;
;January 19: Revocation of rules prohibiting unlimited wishes&lt;br /&gt;
:An attempt to circumvent the ban in the previous wish by wishing the ban away.&lt;br /&gt;
&lt;br /&gt;
;January 20: A finite but arbitrarily large number of wishes&lt;br /&gt;
:Another attempt to circumvent the ban on unlimited wishes by asking for a number of wishes that is limited, but as large as he likes (and there are some very large finite numbers out there, such as {{w|Graham's number}}).&lt;br /&gt;
&lt;br /&gt;
;January 28: The power to dictate the rules governing wishes&lt;br /&gt;
:Yet another attempt to circumvent the ban on unlimited wishes.&lt;br /&gt;
&lt;br /&gt;
;February 5: Unlimited eyelashes&lt;br /&gt;
:This wish likely caused Black Hat to grow unlimited eyelashes, which could be quite inconvenient and painful. And, yes, one more attempt to circumvent the ban on unlimited wishes.&lt;br /&gt;
&lt;br /&gt;
;February 6: That wish-granting entities be required to interpret wishes in accordance with the intent of the wisher&lt;br /&gt;
:This wish is likely a response to the previous day's misguided wish. It's actually quite a common problem that people making wishes leave them open for misinterpretation.&lt;br /&gt;
&lt;br /&gt;
;February 8: That wish-granting entities be incapable of impatience&lt;br /&gt;
:An attempt to prevent whatever being is powerful enough to grant wishes from becoming angry with Black Hat while he tries to manipulate the system.&lt;br /&gt;
&lt;br /&gt;
;February 12 #1: Unlimited breadsticks&lt;br /&gt;
:The first wish of this day seems to be a reference to the unlimited {{w|breadsticks}} offered at {{w|Olive Garden}}.&lt;br /&gt;
&lt;br /&gt;
;February 12 #2: Veto power over others' wishes&lt;br /&gt;
:A power that could be interesting to have. It also very much fits with Black Hat's character.&lt;br /&gt;
&lt;br /&gt;
;February 19: Veto power over others' wishes and all {{w|United States Congress|congressional}} legislation&lt;br /&gt;
:An improvement of the previous wish. This would be very interesting to have indeed, especially if you are Black Hat, because you could veto any federal law, a power normally entrusted only to the {{w|President of the United States}}.&lt;br /&gt;
&lt;br /&gt;
;February 23: The power to override any veto&lt;br /&gt;
:This wish would allow Black Hat to override vetoes which in addition to the previous wish would effectively make him control the US legislature and, to some extent, also all other governing bodies.  (Notably the {{w|United Nations|UN}}, where the veto powers wielded by the five {{w|permanent members of the Security Council}} cannot be overridden and can have large impacts on global politics.) Note that it will not allow him to turn laws off (veto them) and on again (override the veto) at any moment, as once a bill becomes law it cannot be vetoed.  Without the ability to propose legislation, Black Hat's powers are still limited. The wish may also refer back to the February 19 wish: by granting himself veto power over wishes, Black Hat just made vetoes more powerful than wishes; now he is trying to control other people's vetoes as well, lest they one-up him.&lt;br /&gt;
&lt;br /&gt;
;February 27: The power to see where any {{w|URL shortener|shortened URL}} goes without clicking&lt;br /&gt;
:This wish relates to a common practice especially in tweets or other short length media where full-length meaningful HTML addresses such as &amp;lt;tt&amp;gt;www.somewhere.com/articles/specificdate/title-of-the-page.html&amp;lt;/tt&amp;gt; would not be feasible. So a more compressed but nonsensical string of seemingly random characters is used which links to a link of the full text address. This creates some problems for people who are security or privacy conscious and prefer to be informed beforehand where they will be traveling on the Internet. The use of shortened URLs is also central to many types of {{w|Rickrolling|trolls or practical jokes}} (see &amp;lt;tt&amp;gt;bit.ly/IqT6zt&amp;lt;/tt&amp;gt; for an example), by directing someone to a different location than the link would initially suggest. Thus Black Hat might be wishing to be able to tell where the links go for the purpose of avoiding this sort of trolling.&lt;br /&gt;
&lt;br /&gt;
;February 29: The power to control the direction news anchors are looking while they talk&lt;br /&gt;
:This wish likely appeals to Black Hat's mischievous side, allowing him to cause news anchors to look at the wrong camera during live broadcast. Repeatedly switching to the incorrect camera would cause havoc in the studio. Additionally, Black Hat may also attempt to get a news anchor fired by having them stare where they should not such as a female anchor's breasts.&lt;br /&gt;
&lt;br /&gt;
;March 7: The power to introduce arbitrary error into Nate Silver's predictions&lt;br /&gt;
:A reference to {{w|Nate Silver}}, who is a former writer for {{w|Baseball Prospectus}} working on predicting baseball players' stats and now writes for ''{{w|Five Thirty Eight}}'' in which he predicts the outcome of elections based on polling data. This would grant Black Hat the power to influence the result of elections. This would tighten the Black Hat's control of the US even more.&lt;br /&gt;
&lt;br /&gt;
;March 15: A house of stairs&lt;br /&gt;
:This wish refers to the {{w|lithograph}} ''{{w|House of Stairs}}'' by {{w|M. C. Escher}}, or perhaps another of his lithographs, ''{{w|Relativity (M. C. Escher)|Relativity}}''.&lt;br /&gt;
&lt;br /&gt;
;March 23: A universe which is a replica of this one sans rules against meta-wishes&lt;br /&gt;
:Another attempt to circumvent the rules against wishing for more wishes by creating a {{w|parallel universe}} without such rules.&lt;br /&gt;
&lt;br /&gt;
;March 29: Free transportation to and from that universe&lt;br /&gt;
:While the previous wish may have worked, Black Hat notes a problem with it: he is still in our universe with no way to get to his new one.&lt;br /&gt;
&lt;br /&gt;
;April 2: A clear explanation of how wish rules are structured and enforced&lt;br /&gt;
:It appears that one or both of the previous two wishes failed, so Black Hat tries to discover exactly what is offending the Bureau. Having clear rules and how they work helps anyone finding loopholes in them.&lt;br /&gt;
&lt;br /&gt;
;April 7: The power to banish people into the TV show they are talking about&lt;br /&gt;
:Black hat is obviously fed up of hearing people talking about certain TV shows, and would like to be able to banish them into the show, thus prevent him having to listen to those people. It would be quite horrifying for the person getting banished.&lt;br /&gt;
&lt;br /&gt;
;April 8: Zero wishes&lt;br /&gt;
:An attempt to hack the wish-granting system by using a quite common vulnerability in input validation: an unexpected value. There may be multiple vectors this can work:&lt;br /&gt;
:* in many computer systems, 0 is reserved for unlimited or undefined&lt;br /&gt;
:* the number may be used as a divisor in some equation and this will make the system {{w|divide by zero}} and probably crash&lt;br /&gt;
:* there also may be an assertion like &amp;quot;&amp;lt;tt&amp;gt;number of wishes granted == 1&amp;lt;/tt&amp;gt;&amp;quot; which would fail, again crashing the system&lt;br /&gt;
:* similarly, if viewed as a computer system, it is possible that the wish decrement (subtracting 1 from the number of remaining wishes) is performed ''after'' the wish is granted, thus resulting in either &amp;amp;minus;1 wishes (another common placeholder for unlimited numbers), or an {{w|integer overflow}} if the wish counter is stored as an unsigned integer; the overflow can result in an exception, otherwise &amp;amp;minus;1 becomes represented as one less than the size of the integer – basically, an extremely large number.&lt;br /&gt;
:However it seems the eyelash wish-granting system does proper input validation on zero because it did not crash or grant unlimited wishes&lt;br /&gt;
:This wish may also be a reversal of the January 9 wish. Black Hat is attempting to win his game by introducing a {{w|logical contradiction}}: if he gets &amp;quot;zero wishes&amp;quot;, this is one wish granted; however, if it is not granted, then, de facto, he will have been granted zero wishes. This is a common technique used in logical proofs to show that an earlier assumption does not hold (in this case, the possibility of eyelash wishing to work).&lt;br /&gt;
&lt;br /&gt;
;April 15: Veto power over clocks&lt;br /&gt;
:Midnight, April 15 is the deadline for filing income tax returns in the United States.&lt;br /&gt;
:It may also be that Black Hat, now in control of all human legislation, is attempting to extend this to further control also rules of nature – in this case: time. The strange wording is likely to be due to Black Hat having consulted with the wish-hacking manual he acquired April 2.&lt;br /&gt;
&lt;br /&gt;
;April 22: A Pokéball that works on strangers' pets&lt;br /&gt;
:A reference to the {{w|Pokémon}} series of video games. A Pokéball can be thrown at a Pokémon (or in this case, a pet that the Pokéball thrower finds either annoying or cute) to capture it and achieve ownership of it. Unless cheats are used, Pokéballs cannot be used on Pokémon owned by other people in the Pokémon games. Many players wish to obtain the often high-level Pokémon of NPCs, and Black Hat may also be interested in pranking other players by stealing their powerful Pokémon. This was later revealed to be one of Randall's wishes in the title text of [[1705: Pokémon Go]].&lt;br /&gt;
&lt;br /&gt;
The title text is yet another mischievous wish. The coefficients of friction, though usually not noticed as they are unchanging, are all-important when performing physical activities — imagine trying to play hockey on a field of sandpaper or sprinting over a sheet of ice.  In addition to the difficulty going where you want or getting any balls that might be in play where you want them to go in a changing friction environment, angular momentum would also be very difficult to control.&lt;br /&gt;
&lt;br /&gt;
Note that when Black Hat makes meta-wishes no follow-up wishes are logged. Since the meta-wishes failed, no valid eyelash wish condition existed and the illegal test wishes were not logged in the eyelash wish log.&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
:{|&lt;br /&gt;
! align=&amp;quot;left&amp;quot; colspan=&amp;quot;2&amp;quot; |&amp;lt;font size=&amp;quot;+1&amp;quot;&amp;gt;Eyelash Wish Log&amp;lt;/font&amp;gt;&lt;br /&gt;
|-style=&amp;quot;color: gray;&amp;quot;&lt;br /&gt;
|&lt;br /&gt;
|align=&amp;quot;right&amp;quot;|Wish bureau ID#:&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|align=&amp;quot;right&amp;quot;|21118378&lt;br /&gt;
|-style=&amp;quot;color: gray;&amp;quot;&lt;br /&gt;
|&lt;br /&gt;
|align=&amp;quot;right&amp;quot;|Date range:&lt;br /&gt;
|-&lt;br /&gt;
|align=&amp;quot;right&amp;quot;|Jan-Apr 2012&lt;br /&gt;
|-&lt;br /&gt;
|}&lt;br /&gt;
:[a picture of Black Hat is above text saying Wisher]&lt;br /&gt;
:{|&lt;br /&gt;
!align=&amp;quot;left&amp;quot; width=&amp;quot;50px&amp;quot;|Date&lt;br /&gt;
!align=&amp;quot;left&amp;quot;|Wish&lt;br /&gt;
|-&lt;br /&gt;
|Jan 09&lt;br /&gt;
|That wishing on eyelashes worked&lt;br /&gt;
|-&lt;br /&gt;
|Jan 12&lt;br /&gt;
|A pony&lt;br /&gt;
|-&lt;br /&gt;
|Jan 15&lt;br /&gt;
|Unlimited wishes&lt;br /&gt;
|-&lt;br /&gt;
|Jan 19&lt;br /&gt;
|Revocation of rules prohibiting unlimited wishes&lt;br /&gt;
|-&lt;br /&gt;
|Jan 20&lt;br /&gt;
|A finite but arbitrarily large number of wishes&lt;br /&gt;
|-&lt;br /&gt;
|Jan 28&lt;br /&gt;
|The power to dictate the rules governing wishes&lt;br /&gt;
|-&lt;br /&gt;
|Feb 05&lt;br /&gt;
|Unlimited eyelashes&lt;br /&gt;
|-&lt;br /&gt;
|Feb 06&lt;br /&gt;
|That wish-granting entities be required to interpret wishes in&amp;lt;br&amp;gt;accordance with the intent of the wisher&lt;br /&gt;
|-&lt;br /&gt;
|Feb 08&lt;br /&gt;
|That wish-granting entities be incapable of impatience&lt;br /&gt;
|-&lt;br /&gt;
|Feb 12&lt;br /&gt;
|Unlimited breadsticks&lt;br /&gt;
|-&lt;br /&gt;
|Feb 12&lt;br /&gt;
|Veto power over others' wishes&lt;br /&gt;
|-&lt;br /&gt;
|Feb 19&lt;br /&gt;
|Veto power over others' wishes and all congressional legislation&lt;br /&gt;
|-&lt;br /&gt;
|Feb 23&lt;br /&gt;
|The power to override any veto&lt;br /&gt;
|-&lt;br /&gt;
|Feb 27&lt;br /&gt;
|The power to see where any shortened URL goes without clicking&lt;br /&gt;
|-&lt;br /&gt;
|Feb 29&lt;br /&gt;
|The power to control the direction news anchors are looking while they talk&lt;br /&gt;
|-&lt;br /&gt;
|Mar 07&lt;br /&gt;
|The power to introduce arbitrary error into Nate Silver's predictions&lt;br /&gt;
|-&lt;br /&gt;
|Mar 15&lt;br /&gt;
|A house of stairs&lt;br /&gt;
|-&lt;br /&gt;
|Mar 23&lt;br /&gt;
|A universe which is a replica of this one sans rules against meta-wishes&lt;br /&gt;
|-&lt;br /&gt;
|Mar 29&lt;br /&gt;
|Free transportation to and from that universe&lt;br /&gt;
|-&lt;br /&gt;
|Apr 02&lt;br /&gt;
|A clear explanation of how wish rules are structured and enforced&lt;br /&gt;
|-&lt;br /&gt;
|Apr 07&lt;br /&gt;
|The power to banish people into the TV show they're talking about&lt;br /&gt;
|-&lt;br /&gt;
|Apr 08&lt;br /&gt;
|Zero wishes&lt;br /&gt;
|-&lt;br /&gt;
|Apr 15&lt;br /&gt;
|Veto power over clocks&lt;br /&gt;
|-&lt;br /&gt;
|Apr 22&lt;br /&gt;
|A Pokéball that works on strangers' pets&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
{{Comic discussion}}&lt;br /&gt;
&lt;br /&gt;
[[Category:Comics featuring Black Hat]]&lt;br /&gt;
[[Category:Comics featuring Nate Silver]]&lt;br /&gt;
[[Category:Pokémon]]&lt;br /&gt;
[[Category:Time]]&lt;br /&gt;
[[Category:Animals]]&lt;br /&gt;
[[Category:News anchor]]&lt;br /&gt;
[[Category:Video games]]&lt;/div&gt;</summary>
		<author><name>162.158.91.125</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=Talk:2077:_Heist&amp;diff=166362</id>
		<title>Talk:2077: Heist</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=Talk:2077:_Heist&amp;diff=166362"/>
				<updated>2018-11-26T16:54:32Z</updated>
		
		<summary type="html">&lt;p&gt;162.158.91.125: &lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;&amp;lt;!--Please sign your posts with ~~~~ and don't delete this text. New comments should be added at the bottom.--&amp;gt;&lt;br /&gt;
You know, this isn't just a movie trope, this is an actual technique that is used ALL the time: https://youtu.be/rnmcRTnTNC8?t=2000 Is this worth mentioning in the explanation? [[User:Cgrimes85|Cgrimes85]] ([[User talk:Cgrimes85|talk]]) 16:42, 26 November 2018 (UTC)&lt;br /&gt;
&lt;br /&gt;
There are no movies about cryptocurrency heists yet (to the best of my knowledge), but this is probably how one would look like.&lt;/div&gt;</summary>
		<author><name>162.158.91.125</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=Talk:1468:_Worrying&amp;diff=166128</id>
		<title>Talk:1468: Worrying</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=Talk:1468:_Worrying&amp;diff=166128"/>
				<updated>2018-11-19T14:44:22Z</updated>
		
		<summary type="html">&lt;p&gt;162.158.91.125: added a comment&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;My first transcript and more-or-less complete explanation. :)  Hope I'm not stealing anyone's thunder... [[User:KieferSkunk|KieferSkunk]] ([[User talk:KieferSkunk|talk]]) 07:45, 2 January 2015 (UTC)&lt;br /&gt;
:The original &amp;quot;transcript&amp;quot; is more like another explanation. It should be changed. Try to see one for another chart comic.  [[User:Kynde|Kynde]] ([[User talk:Kynde|talk]]) 13:32, 2 January 2015 (UTC)&lt;br /&gt;
::I have now made the changes my self and created the table under the explanation --[[User:Kynde|Kynde]] ([[User talk:Kynde|talk]]) 13:32, 12 January 2015 (UTC)&lt;br /&gt;
&lt;br /&gt;
Breaking news being important in movies had already been discussed in xkcd #1387&lt;br /&gt;
&lt;br /&gt;
http://xkcd.com/1387/&lt;br /&gt;
&lt;br /&gt;
[[Special:Contributions/173.245.49.128|173.245.49.128]] 09:27, 2 January 2015 (UTC)&lt;br /&gt;
&lt;br /&gt;
&amp;quot;Being in the same vicinity as oranges&amp;quot; should be way right on the &amp;quot;Very worried&amp;quot; axis for movies because of The Godfather. {{unsigned ip|173.245.56.206}}&lt;br /&gt;
&lt;br /&gt;
The heart has 2 atria, one on each side. The wound to the left side of the chest is considered worse because the left ventricle so more of the heart is on the left side {{unsigned ip|108.162.215.78}}&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
One of the most serious movie situations is entering a bathroom. [[User:Mark31415926|Mark31415926]] ([[User talk:Mark31415926|talk]]) 03:13, 3 January 2015 (UTC)&lt;br /&gt;
&lt;br /&gt;
:Like the movie Cast-Away? Can't even take a pee without a jet engine soon sucking in seawater and exploding near you. [[Special:Contributions/108.162.215.94|108.162.215.94]] 09:03, 3 January 2015 (UTC)&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
I'm pretty sure the nosebleed thing is a reference to The Ring. [[Special:Contributions/108.162.212.106|108.162.212.106]] 22:13, 12 September 2015 (UTC)&lt;br /&gt;
:I'm of the opinion that nosebleed as something to be worried about is pretty universal in movies. In animes, though, it's just a sign that there are attractive people nearby... [[Special:Contributions/188.114.99.189|188.114.99.189]] 22:53, 4 December 2015 (UTC)&lt;br /&gt;
&lt;br /&gt;
Attila the Hun is traditionally supposed to have died of a nosebleed. [[User:Gmcgath|Gmcgath]] ([[User talk:Gmcgath|talk]]) 21:53, 30 October 2016 (UTC)&lt;br /&gt;
&lt;br /&gt;
I saw an imgur image a few months ago of a blood clot pulled out of an elderly gentleman administered to hospital with trouble breathing.  The blood supply was from a nosebleed.&lt;br /&gt;
To understand how serious this actually was - the clot formed a very detailed map of the inside of his lungs... [[Special:Contributions/162.158.91.125|162.158.91.125]] 14:44, 19 November 2018 (UTC)&lt;/div&gt;</summary>
		<author><name>162.158.91.125</name></author>	</entry>

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