explain xkcd - User contributions [en]

Talk:3082: Chess Position

2025-04-29T10:18:28Z

172.70.85.48:

This is very nearly the core plot conceit of the movie ''Π'' (1998). [[Special:Contributions/172.70.130.190|172.70.130.190]] 22:36, 28 April 2025 (UTC)
:I believe you want lower-case Pi: π not Π. https://en.wikipedia.org/wiki/Pi_(film) --[[User:PRR|PRR]] ([[User talk:PRR|talk]]) 22:54, 28 April 2025 (UTC)

Does anybody know whether Randall has taken up chess as a hobby? 5 of the 82 comics in the 3000s have been related to chess and only 2 in the 2000s were. If so, this should be included in the explanation. [[User:BobcatInABox|BobcatInABox]] ([[User talk:BobcatInABox|talk]]) 23:11, 28 April 2025 (UTC)
:3000s? [[Special:Contributions/172.71.190.236|172.71.190.236]] 23:40, 28 April 2025 (UTC)
:Oh right comic number not decade/millennium. [[Special:Contributions/172.70.43.157|172.70.43.157]] 23:41, 28 April 2025 (UTC)
:Wouldn't surprise me, there's a three year gap in between chess comics 2465 (May 2021) and 2936 (May 2024), then the aforementioned 5 in 5 months. [[Special:Contributions/172.70.114.251|172.70.114.251]] 00:46, 29 April 2025 (UTC)

I really suspect that the full explanation has something to do with this:

https://www.kasparov.com/the-implacable-logic-of-the-vortex-of-history/
[[Special:Contributions/172.68.7.206|172.68.7.206]] 23:34, 28 April 2025 (UTC) Dan
: Doubtful, that article was written in 2013, and it is unlikely that Randall came upon it just now to make this comic. Vortex is a general term for something that sucks you in. [[Special:Contributions/172.70.214.66|172.70.214.66]] 00:38, 29 April 2025 (UTC)

I sure hope that it stays as not a real thing [[User:Commercialegg|Commercialegg]] ([[User talk:Commercialegg|talk]]) 01:32, 29 April 2025 (UTC)
: It might not be, but it's easy enough to make: Train an adversarial network on human chess games. [[Special:Contributions/172.68.22.41|172.68.22.41]] 04:56, 29 April 2025 (UTC)

The part about losing the ability to play chess even after building a resistance feels familiar. Isn't that how the Elder Scrolls worked in Skyrim, at least. Even highly trained sages would lose the ability to see for a time after reading an Elder Scroll. And the Oblivion remaster just released the other day...
--[[User:Ragashingo|Ragashingo]] ([[User talk:Ragashingo|talk]]) 01:54, 29 April 2025 (UTC)

----
Cf Von Gom's Gambit by [Victor Contoski](https://en.wikipedia.org/wiki/Victor_Contoski) published in The Magazine of Fantasy and Science Fiction, December 1966:

And what of Von Goom's Gambit? Chess is a game of logic. Thirty-two pieces move on a board of sixty-four squares, colored alternately dark and light. As they move they form patterns. Some of these patterns are pleasing to the logical mind of man, and some are not. They show what man is capable of and what is beyond his Take any position of the pieces on the chessboard. Usually it tells of the logical or semi-logical plans of the players, their strategy in playing for a win or a draw, and their personalities. If you see a pattern from the King s Gambit Accepted, you know that both players are tacticians, that the fight will be brief but fierce...
Now suppose someone discovers by accident or design a pattern on the chessboard that is more than displeasing, an alien pattern that tells unspeakable things about the mind of the player, man in general and the order of the universe. Suppose no normal man can look at such a pattern and remain normal. Surely such a pattern must have been formed by Von Goom’s Gambit.

I wish the story could end here, but I fear it will not end for a long time. History has shown that discoveries cannot be unmade. Two months ago in Camden, New Jersey, a forty-tliree year old man was found turned to stone staring at a position on a chessboard... {{unsigned ip|162.158.217.38|05:22, 29 April 2025}}

3071: Decay Chain

2025-04-04T16:08:59Z

172.70.85.48: /* Explanation */

{{comic
| number = 3071
| date = April 2, 2025
| title = Decay Chain
| image = decay_chain_2x.png
| imagesize = 312x595px
| noexpand = true
| titletext = If you have an old phone in a drawer, and you listen very carefully, you can occasionally hear the occasional tap of an emitted SIM card hitting the side of the drawer as the phone transmutes to a lower-end model.
}}

==Explanation==
{{incomplete|Created by an iPhone 6 that used to be an iPhone 13 - Please change this comment when editing this page. Do NOT delete this tag too soon.}}
This comic is a play on nuclear {{w|decay chains}}, the series of radioactive disintegrations that the nuclei of unstable atoms undergo. Example diagrams of such nuclear decay chains can be seen {{w|Decay_chain#Thorium_series|here}}. This comic suggests that as iPhone model iterations get higher (and typically, though not entirely, larger and [https://www.plug.tech/blogs/news/how-much-does-iphone-weigh heavier]), they, similarly to heavier chemical elements, become unstable and susceptible to decay into lesser models. Some isotopes of atoms decay into other isotopes, releasing particles in the process. This process is generally dictated by the number of the positively charged protons in an atomic nucleus, which dictate its chemical identity, and the neutrons, which keep the protons in as stable a clump as possible. Particular isotopes, increasingly so for heavier atoms, are known to be subject to one or more modes of {{w|nuclear decay}} in order to attain a more stable and simpler form, including by several such steps. This comic humorously explores how it would work if iPhones decayed similarly. This is absurd, as iPhones are large objects that do not suddenly and drastically change form.{{Citation needed}} (Although, almost all matter on Earth, including iPhones, contain ''some'' atoms that are radioactive and exhibit nuclear decay, mixed with a non-radioactive majority.)

The iPhones in the comic undergo two different types of decay, which mirror two types of nuclear decay:
* In {{w|alpha decay|alpha (''α'') decay}} (vertically downwards, in the diagram) the model number changes from a higher one to a model two steps lower, except for the step involving the iPhone X which apparently exists instead of a "9" model. This is equivalent to the change in {{w|atomic number}} when two protons, together with two neutrons, leave the nucleus in the form of a helium ion (He2+), known as an alpha particle. The atomic number of such atoms reduces by two and the {{w|mass number}} reduces by four (that held by the departing He2+). No evidence is given as to how the respective masses of the phones ''actually'' changes in this analogy.
* In {{w|Beta_decay#β−_decay|beta minus (''β''-) decay}} (a rightward-and-upward step) the iPhones undergo a version upgrade, but also the removal of a brand name modifier (usually denoting additional features included within the same model range), leaving them closer to that new range's most basic model. In elements, the effective conversion of a neutron into a proton and a free electron raises the atomic number by one by transforming a neutral particle to a positive one via emission of a small negatively charged {{w|beta particle}} (an electron), leaving the mass only slightly decreased. The decay step from the iPhone 13 Pro to the iPhone 14 Plus, which is missing a symbol, is clearly one of the ''β''- decay steps.

The specific reason for the decay chain stopping at iPhone '''7''' is unknown. A possible reason for this is because lithium, which is often used in phone batteries, has the stable isotope lithium-7. "Stable" may refer to the usability of the device in terms of whether or not it still receives security updates, but the iPhone 6s also received the [https://support.apple.com/en-us/100100 latest security patch] as of the time this comic was published. Apple has [https://www.bbc.com/news/technology-67911517 paid significant compensation] regarding one of their business practices of intentional obsolescence. Alternatively, [[Randall]] may be suggesting that models up to iPhone 7 were highly reliable, but that models beyond that have become ever more problematic - this would mirror the case of radioactive decay, where it is the higher numbered elements that are unstable.

(After alpha or beta decay, atoms may then emit {{w|gamma radiation}} (high-energy photons) as they rearrange their atomic state without changing their composition, but this process does not change the element in any meaningful way. It also will occur when neutron capture and/or atomic fission has occurred, which is generally considered outside the natural decay chain of any such isotope, and can also result from nuclear fusion. Beta decay also requires emission of an antineutrino, but that particle interacts so weakly with matter that it's undetectable except by extremely sensitive experimental equipment.)

The title text suggests that the "alpha particle" of the iPhone is a {{w|SIM card}}, and that alpha-decaying phones will emit one of these with each decay (despite few phones having more than two, and most working ones only having one, but perhaps that's part of the mystery of telephonic {{w|Nuclear transmutation|transmutation}}). The sound of an old phone, sitting in a drawer, ejecting the unnecessary SIM is likened to the slow click of a {{w|Geiger counter}} registering the decay particles ejected from a decaying radioisotope. Radioactive decay is a random and spontaneous process; without the sound, one would never otherwise know if the phone even ''had'' decayed without {{w|Schrödinger's cat|opening the drawer}} to find out.

A similar comparison between smartphones and physics processes (in this case in stars) happened in [[1422: My Phone is Dying]].

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

[A flowchart with arrows leading from a circle with the words "iPhone 16 Pro Max", to circles with other iPhone names, eventually leading to a circle with the words "iPhone 7"]

:[Caption below the panel:]
:Physicists believe that an iPhone 16 Pro Max will, if left alone long enough, eventually decay into an iPhone 7, the heaviest stable model.

{{comic discussion}}

[[Category:Smartphones]]
[[Category:Physics]]

2103: Midcontinent Rift System

2025-01-10T12:24:13Z

172.70.85.48: Looks like a misplaced Talk comment. Moving.

{{comic
| number = 2103
| date = January 25, 2019
| title = Midcontinent Rift System
| image = midcontinent_rift_system.png
| titletext = The best wedge issue is an actual wedge.
}}

==Explanation==
Recently, USA politics has caused polarization of the public.<ref>[https://news.gallup.com/opinion/polling-matters/215210/partisan-differences-growing-number-issues.aspx Partisan Differences Growing on a Number of Issues]</ref> It is said to be “split” in two camps (progressive/liberal, mostly loyal to the {{w|Democratic Party (United States)|Democratic Party}}, and conservative, mostly loyal to the {{w|Republican Party (United States)|Republican Party}}). Here [[Black Hat]] is trying to get elected to some sort of federal office in the {{w|2020 United States elections|at the time upcoming 2020 elections}} by promising he will actually split America in two. His presentation illustrates, using a giant crowbar, the completion of the {{w|Midcontinent Rift System|Midcontinent Rift}}, which is a large crack that started to form about 1.1 billion years ago, but failed to completely sever the continent. Around the same time, the rift was also mentioned in "How To", Chapter 9: How to build a lava moat.

It is unclear why anyone would vote for such a thing, but people directly affected (the Midwest) are likely to vote against [[Black Hat]]. While Black Hat and his campaign advisor [[Ponytail]] speak of weakness in the Midwest, they are talking about two different things: Black Hat refers to the physical weakness of the North American Plate in the Midwest due to the geological rift which he thinks could be exploited by a large enough crowbar, while Ponytail is referring to a political weakness for Black Hat’s campaign in the Midwest due to the likely-unpopular proposal (different regions of the US have different voters and populations who have different priorities and stances, so candidates and their campaigns’ platforms will likely be more popular in some regions and less popular in others). In this case a successful or attempted completion of the rift would likely result in the destruction of millions of houses, buildings, and other man-made structures, not to mention the deaths of many humans (if proper evacuation were not fully implemented and enforced) as well as millions of animals that could not be evacuated. The proposal would also cause huge economic impacts; the Midwest produces a significant proportion of America’s food supplies and hosts important economic centres, such as Chicago and Cleveland. So the popularity among those directly or even indirectly affected is likely quite low. The successful passing of a highly destructive measure such as this would generally involve more direct and overwhelming compensation of the many interests that would otherwise be harmed, to incentivize them to vote against their present livelihood.

The title text is a pun. A {{w|wedge issue}} is a controversial issue which splits apart a demographic group. It is often introduced to create controversy within an opponent’s base so that if the opponent takes any position on the issue, half the voters will desert the opponent. Here the joke is that the “wedge issue” is an actual wedge to split apart the United States. It could potentially be a wedge issue, as while most people would oppose such a measure, some people could be convinced that it would benefit certain Midwestern cities by making them port cities, which would result in an economic boom and make trade easier if those cities weren't destroyed. Also, some die-hard liberals living outside the Midwest might favor the destruction of the Midwest because it tends to vote conservative (with a few exceptions, such as Illinois and Minnesota, which are more reliably progressive in their voting patterns). Ponytail seems to state that Black Hat's proposal is only unpopular in the Midwest.

==Transcript==
:[A map of North America shows the Midcontinent Rift System as a red line curving through the Great Lakes and down through the midwestern United States.]
:1.1 billion years ago, the North American continent began to split in half.

:[Black Hat stands at a lectern with a "Vote 2020" sign on it. He gestures to an image of the globe with a giant crowbar inserted in the rift with an arrow indicating applying pressure to widen the rift.]
:Black Hat: We don’t know why it stopped. If elected, I vow to ''finish'' the job. Thank you.

:[Ponytail, Black Hat, Megan, and Cueball walk to the right away from a set of stairs. Cueball is looking at a phone and Ponytail is looking at a device or paper with writing on it.]
:Ponytail: Great job up there.
:Black Hat: Thanks! How are my polling numbers?
:Ponytail: Well, I’m seeing some weakness in the Midwest.
:Black Hat: So am I. So am I.

==References==
<references />

{{comic discussion}}
[[Category:Comics with color]]
[[Category:Comics featuring Black Hat]]
[[Category:Comics featuring Ponytail]]
[[Category:Comics featuring Megan]]
[[Category:Comics featuring Cueball]]
[[Category:Elections]]
[[Category:Maps]]
[[Category:Public speaking]]

Talk:2916: Machine

2024-04-10T19:57:56Z

172.70.85.48: /* Limit of 100 components? */

rather late for an april fools comic innit? also there doesn't seem to be anything exciting in this one lol, none of the usual cool exploration easter eggs, as far as i could tell at least [[Special:Contributions/172.71.178.76|172.71.178.76]] 16:41, 6 April 2024 (UTC)Erfaniom
:Randall posted an eclipse comic on Apr. 1. All April Fools comics are interactive. [[User:Z1mp0st0rz|Z1mp0st0rz]] ([[User talk:Z1mp0st0rz|talk]]) 15:27, 10 April 2024 (UTC)

: We're exploring crowdsourced human creativity here, in a way, so it can be a lot more interesting then Randall's exploration comics, at least for me, because i did take two years of GCSE psychology and enjoyed it. [[Special:Contributions/172.64.238.130|172.64.238.130]]

: looks like the egg's on my face lmao, i think i was among the first people to make anything, so everywhere was under construction for me, i didn't even understand that it was like a crowd thing [[Special:Contributions/172.70.210.52|172.70.210.52]] 14:19, 9 April 2024 (UTC)Erfaniom

Just popped over using Chrome on Android and all I see is four "missing picture" logos spinning around, plus another down the bottom right... [[Special:Contributions/141.101.68.193|141.101.68.193]] 18:13, 6 April 2024 (UTC)
:Okay, followup: it behaves quite differently on the non mobile site. You get two entry points with red balls and yellow balls and you need to place the various gizmos to direct the balls to the correct exit point. Once enough have correctly passed to turn the red X into a green tick, you have the option to submit. If you do, once you have named your design it will be added to the grid with other submissions all of which exist to push red and yellow balls around. (if you come across "Memories of Ragnarok", that's mine) [[Special:Contributions/172.71.134.207|172.71.134.207]] 18:27, 6 April 2024 (UTC)
::The number of inputs appears to vary between 1 and 4, each of a different color, with one color-coded output for each. [[User:Claire Kholin|Claire Kholin]] ([[User talk:Claire Kholin|talk]]) 18:49, 6 April 2024 (UTC)

On the "machine" section, you see lots of "under construction cells". Perhaps this will develop as more are submitted. I notice the "under construction tape" has "DJIA" and "31415", perhaps a reference to "dow jones industrial average" and the first five digits of pi. [[User:Zeimusu|Zeimusu]] ([[User talk:Zeimusu|talk]]) 18:37, 6 April 2024 (UTC)
:Whenever someone submits a cell, it fills in one of the under construction cells. [[User:Claire Kholin|Claire Kholin]] ([[User talk:Claire Kholin|talk]]) 18:49, 6 April 2024 (UTC)
[Robert'); DROP TABLE Student!:;--] i just got a machine with 3 outputs one yellow another red and a third blue AND green and 3 inputs one green one blue and one red blue and yellow https://xkcd.com/2916/#xt=7&yt=50 hope its still there {{unsigned ip|172.70.115.173|18:01, 9 April 2024}}
:I think I just 'did' one with a Red+Yellow source (also separate singular Blue and Green) and a combined Blue+Green sink (and separate Yellow and Red). Got it working well, actually using fan-levitation to separate the R+Y enough to route them to their destinations, the Y then having to cross the occasional flying Green (which I was forced to "Bonk" and bounce up, entry being nearly at the bottom on right, exit being nearly at top on left) for its exit, everything else fairly simple. No idea if it got integrated, of course. Never seen any of my machines be accepted (when I later look around at what's there), so I'm still unsure if there's anything I can do to increase my chance of a successful square being made permanent on the grid.... [[Special:Contributions/172.70.163.49|172.70.163.49]] 20:58, 9 April 2024 (UTC)
:...still had it sitting there [https://imgur.com/kZdp3kH on my browser], though note that the Red+Yellow supply (mid-left) and the Green supply (right) aren't working here, through the "move the screen around, lose the feeds from 'Under Construction' squares" issue, or similar. But still I managed to submit it. The occasional Yellow and Red are falling from the Blue entrance in the top (I've not done anything special to filter those out/send them to a more proper exit, and it's too late to do so now anyway, it was just a Blue entry during the development process, of course).
:It's a pity you can't see it working, but I quite like my Yellow/Red separation. This might be the only time you see it in place, though, so a shame I didn't take a screenshot immedediately after submitting it. [[Special:Contributions/172.70.163.49|172.70.163.49]] 21:30, 9 April 2024 (UTC)

I wanted to add an image for each object, but do not have the necessary access, can someone who has access add the images that I linked in the table so they can be included? [[User:Claire Kholin|Claire Kholin]] ([[User talk:Claire Kholin|talk]]) 18:49, 6 April 2024 (UTC)

I found a discussion with some guy talking about the API at https://euphoria.leet.nu/room/xkcd/ ; this could be useful for the wiki.

<code>
[c+1] now time to try fucking with the api
[c+1] https://incredible.xkcd.com/
[userwithnoaccount] 404
[c+1] it seems there are numbered machines under incredible.xkcd.com/machine/x
[c+1] returns a grid of individual machinlets
[c+1] which are uids like 3a7af27c-5389-5dcb-b660-3feab6be2ceb
[c+1] they're stored at urls like incredible.xkcd.com/folio/3a7af27c-5389-5dcb-b660-3feab6be2ceb
[c+1] there appear to be 33 machines total
[c+1] the json it returns seems to refer to these as "versions"
[c+1] $ curl -s https://incredible.xkcd.com/machine/21 | jq ".version"
21
[c+1] there is a machine/0, but it's all null
[c+1] going to https://incredible.xkcd.com/machine/current redirects to the current machine
[c+1] $ curl -sL https://incredible.xkcd.com/machine/current | jq ".version"
35
[c+1] wait, is that the *total* number of mahcines?
[c+1] i would've thought there'd be more
[c+1] this whole think is rather esoteric
[c+1] Written in rust, too: https://rapier.rs/
[c+1] Uh oh.
https://i.hypercone.us/?v=8e283d
[c+1] HMMM
https://i.hypercone.us/?v=079f8f
[c+1] it seems there is no limit
[c+1] i've uploaded a ~50M title
</code>

[[Special:Contributions/172.70.57.146|172.70.57.146]]

Had quite a lot of fun, added a few 'successful' machines to the grid. Noted that whenever I try to use the Prism that (after a short delay) the comic-pane blanks and I need to refresh the page/get a completely new 'challenge' to start from scratch, so I'm just not using the prism at all (used most of the other items, in combination or 'just the one across the whole board', whichever seems most fun). But it doesn't seem to do what I'd like it to do, which is sort multiple colours from the same inflow into different outflow directions. Which would be ''very'' useful in a 'crossroads' situation, the general solution of directing them cross-path being too prone to random collisions. Also might be useful in the 'submitted machine grid', as I note that errors propagate, whereas adding a filter on all inputs would clean out (dispose of/send off to a valid gate?) the rogue balls. Anyway, gonna have to come back to this later when there's more time... Maybe then I'll even have something useful to add to the Explanation. [[Special:Contributions/172.70.163.31|172.70.163.31]] 19:03, 6 April 2024 (UTC)

The balls appear to be different weights. I just saw a machine that used fans to separate yellows from greens and blues in a sort of 'wheat from the chaff' manner to direct them to their correct outputs. I wonder what other hidden tricks are included. [[Special:Contributions/172.68.1.159|172.68.1.159]] 19:40, 6 April 2024 (UTC)

They're not all accepted, though it makes you think they are. Or something else more complex is going on we haven't realized yet. I made a machine that was working reliably, submitted it, and saw it on the overall grid. Reloading from a different browser I found the same location of the machine, with the same surroundings, but my machine had been replaced. It's nowhere else on the grid either. The first browser still shows it (but not after a reload with a cache clear). I'm not sure if there's some kind of "save" event that needs to happen beyond seeing your machine in the broader one, or if all user collaboration is an illusion, or if the system changes its mind about us somehow.

: Yeah, i've been seeing this too. Please tell me if you find any of my machines, images at https://i.hypercone.us/?v=22d562 , https://i.hypercone.us/?v=ad8e3a , and https://i.hypercone.us/?v=8d4d6a . I want to be one of the few to have added Catalan and Spanish to the grid. [[Special:Contributions/172.71.134.164|172.71.134.164]] 20:56, 6 April 2024 (UTC)

I've added some more observations to the page. Also, a guess which is too uncertain to put on the main page: The ball launcher for the yellows on the far left side misses a lot, and the yellow container isn't the one on the left. So I think the whole machine with crossing streams will result in the colors being sorted in their container order, and possibly have the streams combined and deposited at the bottom just above the containers. --[[Special:Contributions/172.71.147.100|172.71.147.100]] 21:07, 6 April 2024 (UTC)

has anyone seen the boat at the very bottom? [[User:Mushrooms|Mushrooms]] ([[User talk:Mushrooms|talk]]) 21:21, 6 April 2024 (UTC)

trying to see it on Firefox for Ubuntu and it just tells me to "visit xkcd.com to view" - THAT'S WHERE I AM?! Tried clearing website data (but not my entire cache) and that didn't help. Is there something I'm missing?

Oooh, just had one with four ball-entries (four colours) and ''three'' exits (one caters for two arrows). Pity it's rather complicated to get entries to exits (even if I can merge two of the streams). Might have to give up on it, but I'd like to have seen how it fits in with the 'submited grid'. i.e. someone else gets a two-colour introduction spot. [[Special:Contributions/162.158.74.119|162.158.74.119]] 22:37, 6 April 2024 (UTC)
:Me again. I'm just refreshing the page, looking at the pattern of entries/exits (just a dozen or so screens in, getting some repeats of pattern, indicating that it's going back to tiles it was suggesting before, probably depends on how many others are contributing and extending...)
:Found another 'double-colour' example. Two yellows ''from the same side'', which probably means that there's a two-yellows been asked to exit from the neighbour (will check shortly).
:Quickly adapting from my spreadsheet notation, "R, Y, G, B" in order, each "(Entry, Exit)", I've been using <dir> of L/R/T/B and a number (nominally percentage, though seems to include only values of 20, 30, 50, 70 and 80, so it ''might'' be more 1/6..5/6?) relating to the distance along from L to R (for T/B) or T to B (for L/R).
:This line is therefore (0,0)(L20+L70,R30+B70)(R80,L80)(T70,L50) ... no reds, two yellow pairings, a red pairing, a blue pairing. Would require at least two path-crossings (but I was going to calculate those things later, and double-colours might confuse my intended simple line-intersection calculation).
:...anyway, spent some time on this message, which might mean I'll get into a 'new batch' of available patterns as people have succeeded some of the challenges that I've been 'swiping left'. [[Special:Contributions/172.70.162.20|172.70.162.20]] 19:28, 7 April 2024 (UTC)
:...very next click: (0,0)(T30+L20,R20+R70)(R80,L80)(R50,B50), which is clearly the actual left-neighbour of the above. [[Special:Contributions/172.70.162.19|172.70.162.19]] 19:32, 7 April 2024 (UTC)
:Ok, stopped my refreshing to [https://imgur.com/a/OMFOmzy 'solve' a screen]. First of all I routed both yellows entries (right-upper and upper-right) to one yellow exit (middle-left) and gradually teased the greens across (lower-left to middle-right), as that way I was avoiding a criss-cross of balls, but the the other yellow exit (left-lower) was, of course, invalid.
:Changed it to drop one stream of yellows down towards the lower exit, across the rapidly firing greens (added a fan to filter away the occasional yellow that gets bounced over there, not much of an opportunity to filter falling-greens out of the yellow exit, so apologies to whoever gets the sceen below). Submited as "Two Yellows, One Green!", whether or not that'll save (apparently, I should continue to contribute and not refresh/close, or else the server will not keep the solution?).
:Interestingly, all four adjacent tiles are "Under construction", and if I scroll up... *DARN* the comic has blanked out (nothing there between the upper PREV/RANDOM/NEXT buttons and the lower ones, just whitespace). This may mean that it did not save. This is the kind of 'page crash' I get when I try using a Prism or get too many balls rattling around on top of a Black Hole. Perhaps it doesn't like that I'm scrolling into an Under Construction that shouldn't be there? (But then, why ''is'' it there?)
:Anyway, all extra information for everyone.
:I'll just refresh the page and go back and do some more entry/exit mapping, maybe? [[Special:Contributions/172.70.162.20|172.70.162.20]] 20:17, 7 April 2024 (UTC)

If you combine a bunch of these silly claw things in the middle by just spamming it, it begins to lag and do some chaotic collisions, even without balls colliding on it. It's curious how it does that seemingly randomly though. I wonder how calculations are added and if there's a tiny sprinkle of RNG. (Also, errors occur and say something about damaging recursion in the Rust programming language, so I guess we know how it was made. It's also pretty weird how there's not a lot of opening combinations? It's possible that the machine loops over in chunks of gears or something (that's what I'll call them). ([[User talk:Leo|talk]]) 13:15, 7 April 2024 (UTC)

If you place a black hole in the centre of a wheel, it makes the wheel behave unpredictably between resets. Sometimes it's almost normal, sometimes it's a lot faster than usual, and sometimes it's stopped but launches balls that touch it with extreme force. I was able to use this to submit a machine which didn't actually let a single ball through after being submitted. https://i.hypercone.us/?v=928bcd [[Special:Contributions/162.158.33.149|162.158.33.149]] 01:19, 7 April 2024 (UTC)

The page says that (and I have taken note of) the ball hue is ''coded'' to certain values, but is there a logic to those values that might be derived from the colour (either as RGB triplet or HSV/other colourspace definition). For example, the two ball-types with zero green component in their makeup are 'unit density' (green is far heavier "green+red" is far lighter, so it's not a simple relationship, unless it converts from °hue, in some way) and the only secondary colour exhibits non-zero drag. There's the possibility that it just derived from "we need different properties, we need different colours, we have no reason to connect either with other deliberately" or even some non-mathematical symbology (fire=red, water=blue(?), earth=green, air(/sunlight?)=yellow). But it makes me wonder what combination of properties cyan/magenta balls might have, if added. (Or is the choice of those four colours constrained, anyway? Though R/G colorblindness is already something of an accessibility failure, if anyone suffers that.) [[Special:Contributions/172.69.194.205|172.69.194.205]] 17:02, 7 April 2024 (UTC)

[https://pastebin.com/7PAiLnyF Python script to get the URL and title of each Cell in the current machine]

[https://pastebin.com/xBhywGde Result of running that script at the moment] (encoded with ROT13 because pastebin wouldn't let me save it otherwise)
:has anybody at all whatsoever been able to find their creation using this API? [[User:Bellydrum|Bellydrum]] ([[User talk:Bellydrum|talk]]) 21:58, 7 April 2024 (UTC)

[https://pastebin.com/jN5MP2za Result of running that script on the first 42 machines], at least on these it looks like the only difference is that one cell is added each time? [[Special:Contributions/172.71.99.195|172.71.99.195]] 17:22, 7 April 2024 (UTC)

I've submitted four now, none of which was accepted. I tend to spend a lot of time getting them just right. Any hints as to what the acceptance criteria might be? Or do I just stink at this?
[[Special:Contributions/172.69.59.204|172.69.59.204]] 19:47, 7 April 2024 (UTC)

There appears to be a new object: a cat that bats things that touch it.
[[Special:Contributions/172.69.214.39|172.69.214.39]] 20:17, 7 April 2024 (UTC)

Is anyone else experiencing the bug where prisms cause the comic to disappear (leaving only the white background where it was) after a while? It makes viewing the whole machine basically impossible. (On further testing it appears to be firefox-exclusive.) [[Special:Contributions/172.70.162.38|172.70.162.38]] 20:31, 7 April 2024 (UTC)
:I've had the "Prisms break things" from the beginning (before any practical content). As in, trying to use them in a design breaks things. But I ''did'' glance upon their occasional use in the 'view submissions grid'. Right now I'm suffering from "white only" issue (see my "multi-yellow" accounts, above). I ''am'' using Firefox, if that's indeed relevant to this issue, but right now I'm not near any other up-to-date browser I care to use. [[Special:Contributions/172.70.163.31|172.70.163.31]] 21:37, 7 April 2024 (UTC)
:I'm getting the same issue with black holes (which probably makes more sense - put a black hole there and you'd expect everything else to disappear :o) - except that on one occasion I was able to put about 6 black holes in before the 7th one vanished everything.[[Special:Contributions/172.69.194.121|172.69.194.121]] 09:15, 8 April 2024 (UTC)

Has anyone seen their own cell in the machine at all yet? A manual approval system is probably necessary for obvious reasons, but if so it does seem to be moving quite slowly.
[[Special:Contributions/172.69.65.24|172.69.65.24]] 02:58, 8 April 2024 (UTC)

How on earth is everyone seeing different parts of the grid? If I request "view machine" I can only see my own square, and the edges of everyone elses. Nothing else, definitely not all of the machine. [[Special:Contributions/172.68.64.149|172.68.64.149]] 21:11, 8 April 2024 (UTC)
::You should be able to click and drag the view around. [[Special:Contributions/172.71.242.54|172.71.242.54]] 21:41, 8 April 2024 (UTC)

Whoever designed the room entirely full of fans is evil - every time I scroll near it my entire browser freezes up and becomes unresponsive. And then the comic usually blanks.[[Special:Contributions/172.69.194.81|172.69.194.81]] 08:23, 9 April 2024 (UTC)

== Level scrolling bug ==

When one views the whole machine, and scrolls down far enough, everything just disappears, and the comic is completely unresponsive. Has anyone else seen this? [[Special:Contributions/198.41.236.152|198.41.236.152]] 20:38, 7 April 2024 (UTC)

:I'm now seeing the same issue, I wasn't before. (I'm using Chrome) [[Special:Contributions/172.70.162.20|172.70.162.20]] 21:06, 7 April 2024 (UTC)

::A hard refresh appears to have fixed this for me (same person as above). [[Special:Contributions/141.101.99.101|141.101.99.101]] 10:28, 8 April 2024 (UTC)

:I've been having this issue as well (I'm using firefox). Opening the site in Edge instead seemed to work around it for me, so it might only affect Firefox (and derivatives). [[Special:Contributions/172.70.163.31|172.70.163.31]] 21:27, 7 April 2024 (UTC)
::See also the 'firefox bug' comments currently immediately above this section. (Please don't ask me to start Edge up, I hate it, won't use it any more than the system requires me to...) [[Special:Contributions/172.70.163.31|172.70.163.31]] 21:37, 7 April 2024 (UTC)

:Update - I did a hard refresh so I could play around with the new additions and I'm no longer encountering the bug, even on firefox. I think the "white screen" bug is fixed now and you just need to hard-refresh to download the fixed JS instead of using the cached one. (same person as 172.70.163.31 and 172.70.162.38) [[Special:Contributions/172.70.86.16|172.70.86.16]] 11:16, 8 April 2024 (UTC)

==New Category: Ball Pit?==

What do you think about a new category for comics with [[ball pits]]? [[150]], [[219]], [[485]], [[498]], [[2916]]? [[Special:Contributions/162.158.134.229|162.158.134.229]] 21:50, 7 April 2024 (UTC)

[[Category:Playpen balls]] already exists.
[[Special:Contributions/172.70.174.133|172.70.174.133]] 17:35, 9 April 2024 (UTC)

== Prism Use? ==

Can the prism be used to sort balls by color? (or in any other way that is useful and different?) [[Special:Contributions/172.68.34.61|172.68.34.61]] 12:11, 8 April 2024 (UTC)
:From what I've seen, no. Though may be ''extremely'' susceptible to incident angle. As far as my own use has been, they seem to randomise the trajectory (possibly also do a total-internal-reflection, I've had balls bounce around and exit at ''really'' weird angles), but it's hard to collimate a feed of balls into a single exact track, even straight down from a ceiling-feed (if you have a ceiling feed directly over the floor exit, lucky you, it'll still occasionally perturb balls off to the sides just enough to be bounced out as a gate-miss, unless you add 'funnel' architecture of one kind or another). Oh, and when balls do a lot of 'internal bouncing' it often forced me to reload the comic (overloaded the physics engine?), so could not continue to tweak the same design.
:On the other hand, perhaps this was the ''intent'', and just code/browser failings made it work erratically. Maybe would be an idea to go back and retest for this (anybody who can), do a little !!science!! to be recorded and explained on the page. [[Special:Contributions/172.69.43.183|172.69.43.183]] 12:51, 8 April 2024 (UTC)
:So, ive did some testing and found..nothing. i ''did'' find some uses for the prism though. Like outting them diagonally makes the balls follow a "path", speeding up more and more (not really that great but it works with yellows), and that any ball hitting the left edge will try to go the the right edge. Not sure what else it can do, though. [[User:Begocc|Begocc]] ([[User talk:Begocc|talk]]) 09:35, 10 April 2024 (UTC)
::I did some thorough testing on a combined Red/Blue set of balls (carefully managed so that they were dropping into the target area as similarly as possible) and both rotated and moved the prism in various ways to check for any effects - like needing to enter parallel/perpendicular to the colour-bands, either to land on the 'target band' or start to pass across it, with the band then either facilitating or angling its 'fall through'. (Just visually checked, at first, then later adding 'buckets' below and to the sides, to try to catch balls departing on various trajectories in various 'clumps' making note of any that hit the 'bucket'-boundaries and bounced off elsewhere.)
::I found no significant sorting, and some balls would jitter around so much (within the prism) that they even launched almost straight back up where they came from (less poerfully than a Bonk-buffered ball, but not far off - also not reliable enough to use as a ball-elevator).
::In my experience, Yellow-sorting is easy (even against Blue and/or Red) by other means. Green is the easiest to have everything else sorted ''from'' (because it resists the fan method). The hardest to unmix are Reds from Blues, which one might think ''should'' be the most prism-differentiated but I'm afraid I just can't invoke that. Easier to have them fall a long way then bounce off a suitable bit of 'furniture', I can then get them to distribute ''fairly'' distinctly in two handy recepticles/onward-feed-hoppers, though it does need some careful placement of items to do it justice. It appears that none of my designs have made it to the 'public wall', but I have made a submitable machine or two that does such sorting sufficiently successfully to send it out (theoretically) to be seen. [[Special:Contributions/172.70.163.30|172.70.163.30]] 11:38, 10 April 2024 (UTC)

== Bugs and Exploits ==

You can use a sword to break the physics on the hinge thingy and create your very own "magnetic hill": https://imgur.com/a/IRZ0AlL [[Special:Contributions/162.158.134.108|162.158.134.108]] 13:02, 8 April 2024 (UTC)
:Hard to tell from that what other fans (perhaps) you've got completely off-clip.
:Those hinge-thingies can definitely be shifted by horizontal (outwith ball-weight pressures), but I've not found them to be reliable components as the "Stop" button (ball reset) seems to let those 'hinges' slring back to level, which might need a re-reset by moving them back past the thing that's holding them off-level.
:I have tried a few things with them:
:*'Ticker' mechanism, almost like a clock escapement, nudged by the rotating 'waterwheel', perhaps to try to release balls through a stream of other balls whilst keeping the path clear of collisions for each set, in turn.
:*'Batch dumper', accumulating a number of balls (above the 'hinge', behind a vertical bulkhead) until there's weight enough to 'open the hatch' and roll them out. (Again, an attempt to reduce collisions, by clumping batches together).
:*Finely configured inclines, by shoving something up into a free end of hinge with better angular resolution (but, as mentioned, this doesn't seem to want to 'hold', so probably would fail upon submission).
:...I had wondered if there was supposed to be a "falling anvil creates a catapult/ballista" idea behind the piece, but we don't ''have'' falling anvils (and definitely not in a repeating manner), and ball-powered catapult (esssentially "clown/acrobat jumps on one end of seesaw, clown/acrobat on other end flies up into the air") also doesn't seem practical.
:I'll try to recreate ''your'' design, work out if there's anything new about it, but right now looks like it's a fan-powered incline-raiser. [[Special:Contributions/172.70.162.38|172.70.162.38]] 14:23, 8 April 2024 (UTC)
:: No fans! Here's a wider view: https://imgur.com/a/xPJcsor
:: It survives the reset, because the balls falling on the lever push it down to the sword and it gets stuck there every time. But you need to place the sword just right to make the gravity bug happen. And even then it depends on the number of balls in some ways. [[Special:Contributions/172.68.243.27|172.68.243.27]] 14:46, 8 April 2024 (UTC)
::: I've replicated the "tip of sword grabs the 'hinge'" thing, which is very interesting, but not the anti-gravity effect. The movement still seems ''to me'' more like a fan's 'area of effect' thing, than a wonky sense of gravity, the way that the balls are rolling/resisting/interacting with each other. No, I can't see where you've 'hidden' the fan (and I'm sure that fans can't act across submission-grid-boundaries, which was my next guess), so it's a bit of a funny thing that you've got there. [[Special:Contributions/172.70.163.49|172.70.163.49]] 21:35, 9 April 2024 (UTC)

On occasion, two balls will fall from the containers as a pair, as if glued together. When this happens, they float down as if under much lower gravity, and then suddenly explode violently away from each other.[[Special:Contributions/172.69.43.182|172.69.43.182]] 10:56, 10 April 2024 (UTC)

== The USS Buoyancy ==

Guys. The Buoyancy. She ''floats''. When all four sets of balls reach the ball pit there aren't further additions. The boat starts floating on them. I've been watching it for a while. It seems she moves left and will probably end up escaping the ball pit. [[User:DL Draco Rex|DL Draco Rex]] ([[User talk:DL Draco Rex|talk]]) 20:44, 8 April 2024 (UTC)
:Update: A new row spawned in and it reset just before the Buoyancy could escape. Here's a screenshot I grabbed a while before the reset, she'd moved further left by the time the reset occurred. https://imgur.com/gallery/8UCASCu [[User:DL Draco Rex|DL Draco Rex]] ([[User talk:DL Draco Rex|talk]]) 20:51, 8 April 2024 (UTC)

== Added key combinations, found in source ==

ctrl+alt+b
ctrl+shift+option+d
wheel: arrow keys

: Can you clarify what "option" is? I have tried alt, function, and "operating system", and none are doing it.

== Fixed Number of Possible Machinelets? ==

I was resetting my browser to try and find new machinelet configurations, but there seem to be fewer and fewer as the game progresses. Hypothesis: the 'under construction' machinelets are set, and once one of them gets approved and added to the grid, that specific configuration of entrances/exits can't show up again.

== Advanced components? ==

How does one get access to the full set of components to build from? I'm only given planks, mallets, swords, scoops, anvils, bricks and fans. I never get any pillows, bumpers, cats, stick figures et cetera. Do they need to be "unlocked" through some achievement, or what? [[Special:Contributions/162.158.222.102|162.158.222.102]] 11:04, 9 April 2024 (UTC)

This caught me for a while as well. I have since discovered that the tool box has a scroll bar and can be scrolled down; that's where the others are hiding.
::Invisible scrollbars – every GUI obfuscator's favorite tool for making users' lives harder. [[Special:Contributions/162.158.222.142|162.158.222.142]] 18:17, 9 April 2024 (UTC)

== Limit of 100 components? ==

Has anyone else seen this? At some point I started getting a count "95 / 100" towards the bottom of the toolbar. When it hits "100 / 100" the rest of the toolbar greys out, and I can't add anything more. (I suppose the physics engine has to keep a ceiling on the number of possible interactions between components.) —[[User:Scs|Scs]] ([[User talk:Scs|talk]]) 11:53, 10 April 2024 (UTC)
:Yes, quite early on I was dealing with a quite simple 'drop from ceiling straight down to floor' setup. After adding just enough 'funnel' to deal with 'splatter', I then built a castle wall in the open space just to make it fun (with some figures on/below it, that I've also tried to decorate in later submissions), of the 'grey blocks'.
:I actually hit the 100/100 ''exactly'' as I placed my final intended block. (No doubt that it's easy to hit the limit by just overlapping things so you can't see most of them, and other 'useless' placement, too...) [[Special:Contributions/172.70.85.48|172.70.85.48]] 19:57, 10 April 2024 (UTC)

== uss boyancy ==

Why have i not been seeing any uss boyancy [[Special:Contributions/172.70.110.122|172.70.110.122]] 14:04, 10 April 2024 (UTC)

Haha I dare you to go to https://xkcd.com/2916/#xt=7&yt=57 and stare at the two black holes next to eachother >:) [[User:Z1mp0st0rz|Z1mp0st0rz]] ([[User talk:Z1mp0st0rz|talk]]) 15:27, 10 April 2024 (UTC)

== Build a "working" machine from parts? ==

Has anyone started working on this idea:

Since any given machine segment seems to be saved, even if not in the final result, *and* since these segments are failing when combined in the whole, how about a "really working" machine that starts replacing failing segments when they jam or otherwise fail to work in the real machine?

The idea being something like, start the machine. Watch the top row, and see where the parts are failing to pass balls properly after two minutes. Replace the segments that are failing/jaming/etc, and let the new part process balls.

As you work your way down, over about 2 hours at the current size, you will eventually get a machine that properly sends balls down to the bottom, without jamming, without having to "pretend" that off-screen parts are working.

I mean, it's not like a gigantic, 600 segment machine will overflow memory on modern 32gb systems, nor consume so much power that these big huge CPU's will fail, right?

[[User:Keybounce|Keybounce]] ([[User talk:Keybounce|talk]]) 17:41, 10 April 2024 (UTC)
ps.: Why do white holes, black holes, prisms, etc, cause problems on some machines like mine and not others?

explain xkcd:Community portal

2024-02-24T04:39:43Z

172.70.85.48: No thanks. (SP this page, perhaps?)

'''Welcome to the [[explain xkcd:Community Portal|Community Portal]]'''. This set of pages is used to discuss how the [[explain xkcd]] wiki works and is divided into five sections. Please use the table below to find the most appropriate section to post in, or post in the miscellaneous section.
{{Community portal}}
[[Template:Community portal|V]][[Template talk:Community portal|T]][https://www.explainxkcd.com/wiki/index.php?title=Template:Community_portal&action=edit E]

==Tools==
Here are a few tools to start you out:
* [[wikipedia:Wikipedia:Tutorial|Wikipedia's Editing Tutorial]] is a great place to start if you've never edited a wiki before.
* For testing purposes, use our [[Explain xkcd:Sandbox|sandbox page]] or create [[Special:Mypage/Sandbox|your own personal sandbox]].
* If you're interested in editing this wiki, check out our [[Explain xkcd:Editor FAQ|FAQ page]].
* Whenever you add a message or comment, always remember to sign it with <nowiki>~~~~</nowiki> or by clicking [[File:Button sig.png]] in the toolbar.

[[File:Header.png|900px|center]]

2844: Black Holes vs Regular Holes

2023-10-31T10:11:44Z

172.70.85.48: /* Explanation */

{{comic
| number = 2844
| date = October 20, 2023
| title = Black Holes vs Regular Holes
| image = black_holes_vs_regular_holes_2x.png
| imagesize = 525x743px
| noexpand = true
| titletext = Created by the collapse of: [massive stars] [Florida limestone bedrock]
}}

==Explanation==
{{incomplete|Created by a CHILD FALLING IN TO A FRIEND'S BLACK HOLE - Please change this comment when editing this page. Do NOT delete this tag too soon.}}
This comic is a comparison between {{w|black hole}}s and regular, everyday {{w|hole}}s.

{| class="wikitable"
!
! scope="col"| Black hole
! scope="col"| Regular hole
! Scope="col"| Explanation
|-
! scope="row" | Usually formed by...
| Supernovas, colliding stars
| Shovels, small mammals
| When a sufficiently large star has consumed nearly all of its low-atomic-weight "fuel", it collapses. This triggers an explosion of what "fuel" remains, creating a supernova. If enough mass remains after the explosion, it becomes a black hole. A black hole can also be formed if enough mass in a small volume accumulates by two stars, especially neutron stars, colliding. On the contrary, regular holes are often created by a variety of natural and anthropogenic causes including, but not limited to: humans using shovels, small mammals such as moles or dogs, the shift or evaporation of underground water, volcanic processes, etc. Of course, this is by no means limited only to small mammals. Many animals, from elephants to ants, are also known to create this kind of hole.
|-
! scope="row" | Falling in is...
| Definitely fatal
| Sometimes fatal
| Falling into a black hole is almost always fatal, because of the shearing effect created by tidal forces, and/or radiation from its {{w|accretion disk}}. If the black hole was extremely massive (on the order of many galaxies' worth of mass) and had a very large event horizon, the tidal forces at its event horizon would not be very strong, nor would there be a noticeable accretion disk. On the other hand, if a regular hole is deep enough (or someone falls incorrectly), it is possible for someone to die by falling into it.
|-
! scope="row" | Created by the Big Bang
| Maybe
| No
| Like many other celestial objects, black holes may have been created by the {{w|Big Bang}}, however ordinary holes were almost definitely not created this way. [[Technically]], though, because the entire universe started with the Big Bang, everything in it (including ordinary holes) could be argued to be "created" by it.
|-
! scope="row" | Created by children playing at the beach
| I '''''really''''' hope not
| Yes
| The creation of black holes may cause many unfortunate events to occur, and is very difficult to do. Hence, Randall really hopes that children are not accidentally, let alone intentionally, creating black holes on the beach, as this would be cataclysmic for our planet. On the other hand, children commonly dig holes in sand at beaches, and this is a normal thing for them to do.
Alternatively, it could refer to some {{tvtropes|EldritchAbomination|Eldritch Abomination}} children playing at a [https://what-if.xkcd.com/83/ cosmic beach]. In that case, "hopefully not" is also a good response.
|-
! scope="row" | Source of many precious metals
| Indirectly
| Yes
| Both the supernovae that create black holes and various events involving black holes, such as black hole/neutron star mergers, produce large quantities of heavy elements, including precious metals found on Earth. Those metals are often underground, and are thus recovered from a regular hole, called a mine.
|-
! scope="row" | Einstein imagined falling into one
| Yes
| Probably at least once
| The thought experiments of {{w|Albert Einstein}}, particularly in relation to {{w|general relativity}}, involve consideration of what happens when one falls through gravitationally-curved space. Aside from this, almost everyone has had a reason to consider the possibility of falling into a normal hole.
|-
! scope="row" | A component of dark matter
| Maybe
| Probably not
| {{w|Dark matter}} is a theoretical part of the universe, a large amount of its total calculated mass which cannot (yet) be directly seen. It is considered possible that at least some of this 'missing mass' is in the form of black holes. It is not generally considered an option that ordinary holes have anything to do with this.
|-
! scope="row" | Created by the Large Hadron Collider
| No
| Yes
| There were concerns when the {{w|Large Hadron Collider}} (LHC), a particle super-collider, was put into operation that it would create a black hole and destroy the Earth. This obviously hasn't happened yet,{{citation needed}} and is unlikely ever to happen at all. However, many regular holes were created by the LHC, primarily during its construction. This is because it is mostly underground, and holes are an efficient way to get underground.
|-
! scope="row" | Massive stars often collapse into them
| Yes
| No
| If a star is large enough, when the star dies, it may still have enough gravity to collapse back into itself, thus creating a black hole. Other things may collapse into regular holes in a different sense - for example, a house may collapse into a sink hole. However, most regular holes are not large enough for a start to collapse into in this way (unless one considers the near vacuum of space itself to be a 'hole').
|-
! scope="row" | Explored by humans in famous sci-fi stories
| Yes
| Yes
| Many sci-fi stories and movies explore black holes and regular holes alike. In particular, there's the eponymous classic ''{{w|The Black Hole}}'' and more recent films such as ''{{w|Interstellar (film)|Interstellar}}'', both about space missions that encounter a black hole. {{w|Journey to the Center of the Earth}} is a classic novel by {{w|Jules Verne}} (and made into {{w|Journey to the Center of the Earth (1959 film)|various}} {{w|Journey to the Center of the Earth (2008 theatrical film)|films}}) which involves going into a volcano tube (a kind of hole). H. P. Lovecraft's 1921 short story ''{{w|The Nameless City}}'' involves the explorer narrator venturing into an ancient tunnel (entered through a hole) dug by a pre-human civilization under the Arabian peninsula, and ''{{w|At the Mountains of Madness}}'' involves tunnels lost in the continent of Antarctica. 
|-
! scope="row" | Fatal to get a big one in your body
| Yes
| Yes
| If a black hole appeared inside of a person's body, they would almost definitely die instantly.{{citation needed}} The same goes for a regular hole - if you cut out a massive section of a human's body, they would likely bleed out. This also applies for the holes left by bullets and other high-speed projectiles.
|-
! scope="row" | Some of them are the mouths of wormholes
| Maybe
| Yes
| Black holes are commonly portrayed to be the entrances of {{w|wormhole}}s, especially in sci-fi stories. While wormholes remain purely theoretical, if they exist, some common models for them suggest one end would appear as a black hole, drawing matter in to be ejected from a 'white hole' elsewhere. On the other side, many species of worms live in shallow holes, with a "mouth" on the surface - the "mouth" of the "worm hole". This could also be a reference to Star Wars Episode V: The Empire Strikes Back, when the Millennium Falcon spacecraft almost gets swallowed by a giant worm in an asteroid hole.
|-
! scope="row" | Stephen Hawking and Kip Thorne argued that any information that falls into them is lost forever
| Yes
| No
| The {{w|Black hole information paradox}} is a paradox arising from a contradiction between two widely-accepted theories related to black holes. Scientist {{w|Stephen Hawking}}, famous for his research into black holes, said that black holes release their energy over time, eventually disappearing, through {{w|Hawking Radiation}}. According to this theory, if information was also to enter the black hole, it would be released alongside this radiation. On the other hand, the {{w|No-hair theorem}} (which was also explored in What If? 2 in Chapter 1: Soupiter), states that all black holes are completely identical outside of three key features: mass, spin, and electric charge. If information that fell into a black hole is released with Hawking radiation, then that means that there ''must'' be more than three properties of black holes. Issues also arise when considering the destruction of this information, which, according to the fundamental rules of physics, is impossible. The issue is that if black holes can only retain three features, with composition not being one of said features, then this rule would be violated, thus requiring a complete rethinking of the fundamental laws of the universe. Hawking and {{w|Kip Thorne}} famously made a {{w|Thorne–Hawking–Preskill bet|bet}} with {{w|John Preskill}} over this paradox.
On the other hand, information that falls into a normal hole is not lost forever, and can likely still be reobtained, especially if the information is stored physically. The science of recovering information from regular holes is called {{w|archaeology}}.
|-
! scope="row" | Commonly inhabited by meerkats
| Undetermined
| Yes
|{{w|Meerkat}}s commonly live in holes underground. It is highly unlikely that Earth mammals live in black holes, but because it is impossible to know what lies beyond the event horizon it is [[technically]] impossible to falsify the postulate that there are meerkats there.
|-
! scope="row" | (title text) Created by the collapse of
| Massive stars
| Florida limestone bedrock
| As mentioned before, Black holes are often created by the collapse of massive stars. On the other hand, many {{w|sinkhole}}s in Florida are caused due to most {{w|bedrock}} in the state being made of {{w|limestone}}, which is very slightly soluble in water (although that still makes it drastically more soluble than most rocks). When rainwater and groundwater come into contact with this bedrock, it begins to dissolve it, leaving cavities. Eventually, this can dissolve the bedrock so thin that the weight of the ground above it causes the bedrock to collapse. Sinkholes from dissolved limestone are generally entrances to [https://caves.org/ caves] that explore further limestone dissolving from underground waterways. Florida is known for its warm underwater caves [https://www.smithsonianmag.com/science-nature/science-behind-floridas-sinkhole-epidemic-180969158/ and opening sinkholes].
|}

==Transcript==
:[A table comparing two main columns of relevence to various statements]
:[First column is headed:] Black Hole
:[Second column is headed:] Regular Hole
:[Respective statements cells placed to the left of both, below]

:[Statement:] Usually formed by...
:[Black hole:] Supernovas, colliding stars
:[Regular hole:] Shovels, small mammals

:[Statement:] Falling in is...
:[Black hole:] Definitely fatal
:[Regular hole:] Sometimes fatal

:[Statement:] Created by the Big Bang
:[Black hole:] Maybe
:[Regular hole:] No

:[Statement:] Created by children playing at the beach
:[Black hole:] I really hope not [with emphasis on "really"]
:[Regular hole:] Yes

:[Statement:] Source of many precious metals
:[Black hole:] Indirectly
:[Regular hole:] Yes

:[Statement:] Einstein imagined falling into one
:[Black hole:] Yes
:[Regular hole:] Probably at least once

:[Statement:] A component of dark matter
:[Black hole:] Maybe
:[Regular hole:] Probably not

:[Statement:] Created by the Large Hadron Collider
:[Black hole:] No
:[Regular hole:] Yes

:[Statement:] Massive stars often collapse into them
:[Black hole:] Yes
:[Regular hole:] No

:[Statement:] Explored by humans in famous sci-fi stories
:[Black hole:] Yes
:[Regular hole:] Yes

:[Statement:] Fatal to get a big one in your body
:[Black hole:] Yes
:[Regular hole:] Yes

:[Statement:] Some of them are the mouths of wormholes
:[Black hole:] Maybe
:[Regular hole:] Yes

:[Statement:] Stephen Hawking and Kip Thorne argued that any information that falls into them is lost forever
:[Black hole:] Yes
:[Regular hole:] No

:[Statement:] Commonly inhabited by meerkats
:[Black hole:] Undetermined
:[Regular hole:] Yes

{{comic discussion}}
[[Category:Astronomy]]
[[Category:Space]]
[[Category:Cosmology]]
[[Category:Animals]]
[[Category:Comics featuring real people]]

1140: Calendar of Meaningful Dates

2023-08-31T17:22:04Z

172.70.85.48: /* Explanation */ The title text says nothing about the frequency of "9/11" prior to 9/11. It may even support the idea that that pre-9/11 "9/11" was suppressed just like all other "11"s. Reworded to stick to what is obvious{{Citation needed}}, alone...

{{comic
| number = 1140
| date = November 28, 2012
| title = Calendar of Meaningful Dates
| image = calendar of meaningful dates.png
| titletext = In months other than September, the 11th is mentioned substantially less often than any other date. It's been that way since long before 9/11 and I have no idea why.
}}

==Explanation==
The calendar used in the comic is the standard {{w|Gregorian calendar}} of 2012 used by most of Western Civilization. The comic looks at the frequencies of which dates appear in English writings indexed in the {{w|Google Books Library Project}}, by using the {{w|Google Ngram Viewer}} ([http://books.google.com/ngrams link]).

Some dates are more (or less) frequently mentioned because they have a special significance. Other dates have correlations for which there doesn't appear to be any obvious reasons. September 11th has also been the date of two significant battles in the War of 1812 (long before it gained notoriety from the 2001 terrorist attacks), particularly one where the British landed in George Washington's own plantation, which likely bolstered its search volume. Yet the significance of the globally significant terrorism incident probably accounts for most of the occurances, since that time.

The date mentioned in the sub-heading (October 17th) is Randall's birthday.

The title text mystery is explained [http://drhagen.com/blog/the-missing-11th-of-the-month/ here]. In summary, many occurrences of "11th" in the writings were actually misread by the Google Books Library Project's [[wikipedia:optical character recognition|optical character recognition]] software and/or [[wikipedia:reCAPTCHA|reCAPTCHA]] users, becoming one of these: <code>IIth</code>, <code>Ilth</code>, <code>iith</code>, <code>lith</code>, <code>llth</code>, <code>1lth</code>, <code>1ith</code>, <code>l1th</code>, <code>nth</code>.

===Date Significance===
The first of each month is generally more mentioned than others, perhaps because such dates are markers of a new month and may be used as landmark dates or deadlines. Similarly, the final day of each month is commonly a deadline day. Other dates have a less mundane significance, for example:
*January 1 is {{w|New Year's Day|New Year's Day}}.
*February 14 is {{w|Valentine's Day}}.
*February 29 only exists during {{w|Leap year|leap years}}.
*March 15 is the {{w|Ides of March}}.
*March 21 is considered the first day of {{w|Spring (season)|spring}}, by a common convention in the northern hemisphere.
*April 1 is {{w|April Fools' Day}}.
*April 15 is {{w|Tax Day|US Individual Income Tax return filing day}}.
*May 1 is {{w|International Workers' Day|International Workers' Day}}, or {{w|May Day|May Day}}.
*June 4 is the {{w|June Fourth Incident}}, or the Tiananmen Square protests of 1989.
*June 30 is the end of the {{w|Fiscal Year| fiscal year}} for most American states and local governments.
*July 1 is {{w|Canada Day}}.
*July 4 is {{w|Independence Day (United States)|US Independence Day}}.
*September 11 is the date of the {{w|September 11 attacks|2001 terrorist attacks}} in New York City and Washington, DC. It's the largest number by a big margin, most likely because unlike the other dates it has no special name, it's referred to as "9/11" (or "September 11") almost exclusively.
*December 7 is the date of the {{w|Attack on Pearl Harbor|1941 attack on Pearl Harbor}}.
*December 25 is {{w|Christmas|Christmas}}.
*December 31 is {{w|New Year's Eve|New Year's Eve}}.

==Transcript==
:'''Calendar of Meaningful Dates'''
:Each date's size represents how often it is referred to by name (e.g. "October 17th") in English-language books since 2000
:(Source: Google ngrams corpus)
:[A regular Gregorian calendar laid out in a grid, Sunday first, on a leap year, with some numbers larger or smaller than others. Significant outliers are mentioned in the explanation.]

{{comic discussion}}
[[Category: Calendar]]