907: Ages

2014-03-21T15:28:34Z

Mac Dude: Swapped "Bronze Age" for "Pleistocene"

{{comic
| number = 907
| date = June 3, 2011
| title = Ages
| image = ages.png
| titletext = Every age: "I'm glad I'm not the clueless person I was five years ago, but now I don't want to get any older."
}}

==Explanation==
{{incomplete|Explain is wrong at some parts, and sometimes it's just repeating the transcript. Pleistocene doesn't really match the graph. Every age section should have a much deeper explain.}}
This is a graph of the general themes that occur between the ages covered by each individual set of brackets. The layout is a parody of larger timescales of human or geologic history, e.g. "Bronze Age" or "Iron Age".

The "ages" identified and experiences typical at that age:
*"0-3" - babies/toddlers are not self-sufficient and not intelligently communicative.
*"4-12" - children learn language and everything they see and learn is new and interesting.
*"13-17" - teenagers tend to rebel against authority figures (parents, teachers, etc.) thinking they now "know best." Additionally, they tend to be negative about everything they experience in the world.
*"18-22" - young adults first foray into the freedom of the world (aka. college) often results in parties/drinking. Excessive drinking results in vomiting.
*"23-30" - first "adult" relationships beyond school "dating". Which are usually quite difficult.
*"31-42" - real world job stress, beginning families.
*"43-54" - The teenager experience from 13-17 is projected forward to parental experience of a teenager of their own. This quote is a cliche of a parent yelling at their daughter because the daughter's outfit is far too skimpy for the parent's taste.
*"55-75+" - "empty nest" phase with no children, onset of retirement, fewer responsibilities and copious free-time.

The title text is a joke about the short-sightedness of many people in believing their current age to be ideal.

==Transcript==
:A number line labeled "age." The start point is 0, with points labeled 10, 20, 30, 40, 50, 60, and 70, and the line continues past the width of the panel. There are interstitial, non-labeled points. Above the line are labeled brackets. They are (approximated):
::0-3: [Non-sentient]
::4-12: "Everything is exciting!"
::13-17: "Everything sucks!"
::18-22: "Woooo college! Wooooo—" [vomit]
::23-30: "Relationships are ''hard!''
::31-42: "So are careers!"
::43-54: "No daughter of ''mine'' is going out dressed like that!"
::55-75+: [More sex than anyone is comfortable admitting]

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

Talk:1338: Land Mammals

2014-03-06T17:02:38Z

Mac Dude:

Is it mass or weight? --[[Special:Contributions/173.245.53.119|173.245.53.119]] 06:38, 5 March 2014 (UTC)

:It says weight. Since most land animals live on the... land, there is not much difference. I suppose if a lot of aninimals lived near a [https://xkcd.com/852/ prime pole vaulting location] it could skew the results. [[Special:Contributions/108.162.246.117|108.162.246.117]] 06:40, 5 March 2014 (UTC)

I'm really curious, what are the other, unlabeled groupings? [http://vaclavsmil.com/the-earths-biosphere-evolution-dynamics-and-change/ Author's website] {{unsigned ip|108.162.215.46}}

<pre>
On page 186 of Smil's referenced book, there is a bar chart with the following values in millions of tons (*=not used in Randall's graphic):
elephants 0.8
horses 40
pigs 100
cattle 450
people 280
*whales 80
*all wild vertebrates 30
*all domesticated vertebrates 650
</pre> {{unsigned ip|108.162.215.46}}

I think that this graph is actually more illustrative of how much support humans need to maintain themselves (the amount of cattle is astonishing). [[User:Lcarsos|lcarsos]]_a ([[User talk:Lcarsos|talk]]) 07:58, 5 March 2014 (UTC)

:''need''? I don't think we ''need'' so much cattle. It's just that most people prefer hamburgers and steaks to beans. So, how much we ''use'' to maintain ourselves would be better. (BTW, you don't count yourself as human?) -- [[User:Hkmaly|Hkmaly]] ([[User talk:Hkmaly|talk]]) 10:39, 5 March 2014 (UTC)

:According to [http://www.psychologytoday.com/blog/canine-corner/201209/how-many-dogs-are-there-in-the-world] there are 525 million dogs, assuming 20 kg as average weight, this should give 10 squares in the diagram. I can't find reliable numbers for cats, but there are more cats than dogs, but they don't weigh as much, so their total weight could be similar to that of the dogs. --[[Special:Contributions/108.162.254.160|108.162.254.160]] 08:42, 5 March 2014 (UTC)

The blob of 13 under the word Livestock may very well represent both dogs and cats. {{unsigned ip|108.162.215.46}}

===Layout of the blocks===
Does anybody see a reason for the particular layout of the blocks? My first impression was a globe but obviously it doesn't correspond to any continents, etc. [[Special:Contributions/108.162.254.66|108.162.254.66]] 08:44, 5 March 2014 (UTC)
: I've been wondering myself... I do think it is a picture of something. My ideas so far: an eye, a fried egg, a cell. --[[User:Divad27182|Divad27182]] ([[User talk:Divad27182|talk]]) 09:29, 5 March 2014 (UTC)

::It may simply be something-like-a-circle of humans with the rest surrounding it. But it DOES look like a cell. -- [[User:Hkmaly|Hkmaly]] ([[User talk:Hkmaly|talk]]) 10:39, 5 March 2014 (UTC)

:: Could it be a sort of relationship diagram? It looks like we're in the centre, with the animals we have the closest relationships with — our pets and our food — nearest, and those we're less concerned with further away. [[User:Gidds|Gidds]] ([[User talk:Gidds|talk]]) 11:34, 5 March 2014 (UTC)

:::Yes, the overall layout is human-centric, but that doesn't explain the intentionally lumpy and asymmetric regions. It would have been easier to place the blocks in regular shapes (circular, rectangular or otherwise) but Randall chose to do it this way. Cell with a nucleus is a reasonable guess. - [[User:Frankie|Frankie]] ([[User talk:Frankie|talk]]) 14:00, 5 March 2014 (UTC)
::::I think it resembles a (low resolution) globe, with humanity representing the major continent [[User:Boxy|Boxy]] ([[User talk:Boxy|talk]]) 14:19, 5 March 2014 (UTC)

::::I think it shows the relationship of the title text (assuming we are part of land mammals): there are about 1.2K squares in total representing a factor of 1K:1 overall. Thus the shape (resembling bacterium) is explained, the incorporation of all mammals into the shape, and the potential central location of humans (assuming most bacteria lives in our gut). [[Special:Contributions/108.162.219.31|108.162.219.31]] 16:09, 5 March 2014 (UTC)

:::::I'm thinking the data points are placed using a polar coordinate system (although what the axis are I don't know, other than that being human gets you close to the center) combined with a mapping onto an x-y grid. Does that make any sense? --[[User:RenniePet|RenniePet]] ([[User talk:RenniePet|talk]]) 20:56, 5 March 2014 (UTC)

:::::: I think the layout is intended to show two legged creatures in the middle and four legged surrounding it. There are not sufficient six legged creatures to make yet another circle outside the four legged circle. [[User:Spongebog|Spongebog]] ([[User talk:Spongebog|talk]]) 16:47, 6 March 2014 (UTC)

===Identifying the groups===
I would love to identify specific groups. The unlabelled animals come in groups, even the wild animals, even though only *one* of those groups (elephants for some reason) has been labelled. —[[User:TobyBartels|TobyBartels]] ([[User talk:TobyBartels|talk]]) 13:05, 5 March 2014 (UTC)
:Reason for elephant label == "This is how much/little the whole population of the largest land mammals amass to."? (Actually, given the scarcity of elephants, I'm surprised it's a full block. I suspect something else that could have been labelledsuch as "rats" would be far more.) [[Special:Contributions/141.101.99.7|141.101.99.7]] 14:07, 5 March 2014 (UTC)

Per the wikipeda page[http://en.wikipedia.org/wiki/Camel#Distribution_and_numbers] on camels I expect that they are the blob of 3 gray squares. [[User:Mwiser|Mwiser]] ([[User talk:Mwiser|talk]]) Update: I hadn't seen the 1 billion kg == 1 million tons notation which has since appeared. I therefore added camels (and also donkeys) to the table below. [[User:Mwiser|Mwiser]] ([[User talk:Mwiser|talk]])

Non [http://en.wikipedia.org/wiki/New_SI_definitions SI] units should just die [http://xkcd.com/526/ already]. [[Special:Contributions/108.162.241.8|108.162.241.8]] 20:39, 5 March 2014 (UTC)

:Is Randall's ton the metric {{w|tonne}} or the US {{w|short ton}}? -- [[Special:Contributions/108.162.219.65|108.162.219.65]] 22:06, 5 March 2014 (UTC)
::Considering that Randall is very aware of the SI confusion, I'm sure he would have made it clear if he where NOT using metric tonne - so I would say his tonne is 1,000 kg! [[User:Kynde|Kynde]] ([[User talk:Kynde|talk]]) 08:53, 6 March 2014 (UTC)

===Stab at the numbers===
{| class="wikitable sortable" style="width: auto; text-align: center; font-size: 95%; table-layout: fixed; line-height:1.25"
|-
! Land Mammal
! population in Billions
! Average Kilograms
! Total Kilograms in Billions
! xkcd value
! Notes
|-
! Humans
| 7.2
| 70
| {{sort|00504|504}}
| 556
| as of 2013
|-
! Cattle
| 1
| 1740
| {{sort|01740|1740}}
| 1918
| as of 2012
|-
! Pigs
| 1
| 350
| {{sort|00350|350}}
| 386
|
|-
! Chickens
| 19
| 1
| {{sort|00019|19}}
| 21
| not mammals
|-
! Goats
| 0.865
| 46
| {{sort|00039.7|39.7}}
|
| as of 2008... [http://en.wikipedia.org/wiki/Goat#Worldwide_goat_population_statistics src]
|-
! Sheep
| 1
| 80
| {{sort|00080|80}}
| 88
|
|-
! Elephants
| 0.000105670
| 5000
| {{sort|00000.5|0.5}}
|
| as of 2012 [http://www.elephantdatabase.org/preview_report/2013_africa/Loxodonta_africana/2012/Africa src]
|-
! Horses
| 0.058372106
| 500
| {{sort|00029|29}}
|
| as of 2006 [http://horsetalk.co.nz/2007/09/12/world-horse-population-58m/#axzz2v7dtQwJK src]
|-
! Rats
| 10
| 0.35
| {{sort|00003.5|3.5}}
| 4
| 10B is a guess
|-
! Cats
| 0.6
| 5
| {{sort|00003|3}}
| 3
|
|-
! Dogs
| 0.4
| 40
| {{sort|00016|16}}
|
|
|-
! Seal
| 0.022
| 200
| {{sort|00004.4|4.4}}
| 5
| not a land mammal
|-
! Mole
| 6×1014
| 0.075
| 4.5×1013
|
| Numbers are slightly exaggerated, but [http://what-if.xkcd.com/4 it would be nice] to have those quantities
|-
! Krill
| ?
| ?
| {{sort|00300|175-725}}
|
| Wild species with largest biomass (not a land mammal)[https://en.wikipedia.org/wiki/Antarctic_krill#Biomass_and_production src]
|-
! Camel
| 0.014
| 465
| 6.51
|
| As of 2010 [http://en.wikipedia.org/wiki/Camel src]
|-
! Donkey
| 0.04
| 160
| 6.4
|
| As of 206 [http://en.wikipedia.org/wiki/Donkey src] [http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=3&ved=0CDkQFjAC&url=http%3A%2F%2Fwww.ed.ac.uk%2Fpolopoly_fs%2F1.21412!%2FfileManager%2Fdonkey%2520fact%2520sheet.pdf&ei=HO4XU6mlD4WbygGMlICoCg&usg=AFQjCNH4aPhQCgltmd0nkgxB6Zb4QU_qLw&bvm=bv.62577051,d.aWc&cad=rja mass src]
|-

|}
* 1 billion kg == 1 million tons [https://www.google.ca/search?q=convert:+1+kg+to+metric+tons src]
*http://en.wikipedia.org/wiki/List_of_heaviest_land_mammals
*http://en.wikipedia.org/wiki/Lists_of_mammals_by_population
[[Special:Contributions/108.162.241.8|108.162.241.8]] 16:19, 5 March 2014 (UTC)

===Talk about the table===
uhh.... chickens aren't... mammals? (?) [[User:Brettpeirce|Brettpeirce]] ([[User talk:Brettpeirce|talk]]) 17:22, 5 March 2014 (UTC)

:Apparently not. http://www.ask.com/question/are-chickens-mammals
:--[[User:RenniePet|RenniePet]] ([[User talk:RenniePet|talk]]) 03:23, 6 March 2014 (UTC)

:Where does these XKCD numbers come from? Cattle 1740? Humans 556? According to the comic there are 520 Cattle and 358 Humans (million ton). This table makes no sence in the XKCD number department. Appart from that it would be a great table to include in the comic... [[User:Kynde|Kynde]] ([[User talk:Kynde|talk]]) 08:52, 6 March 2014 (UTC)

:Where does the average weight come from? As the human race is very young (26% below 15 years) and the cattle population has is changed very rapidly - thus there will also be many calves all the time - reducing the average weight far below that of an average adult animal ready to made in to beef... [[User:Kynde|Kynde]] ([[User talk:Kynde|talk]]) 09:55, 6 March 2014 (UTC)

:Maybe the seal is considered a land mammal by Randal? Only wales are really not land mamals. The link to elephant population seems only to cover African elephants not Asian... [[User:Kynde|Kynde]] ([[User talk:Kynde|talk]]) 11:01, 6 March 2014 (UTC)

===Title Text===
The title text mentions that bacteria outweigh humans by thousands (plural) to one. The notation 1000:1 used in the explanation is therefore not correct.

explain xkcd - User contributions [en]

907: Ages

Talk:1338: Land Mammals