Main Page

Explain xkcd: It's 'cause you're dumb.
Jump to: navigation, search

Welcome to the explain xkcd wiki!
We have an explanation for all 3232 xkcd comics, and only 72 (2.2%) are incomplete. Help us finish them!

 Go to this explanation

Latest comic

Inflation Timeline
Depending what corners of the internet you hang out on, 'regular' may at times awkwardly coexist with 'sexy.'
Title text: Depending what corners of the internet you hang out on, 'regular' may at times awkwardly coexist with 'sexy.'

Explanation

Cosmic inflation is the theory that the early universe expanded at an exponential rate. This explains the "clumpiness" of the early universe, which is necessary to explain the formation of large-scale structures (e.g. galaxies) as the universe evolved.

"Regular" inflation refers to the economic process where the average price of goods and services increases over time. This is usually gradual, but can be very rapid during times of economic distress.

The comic puts both of these on the same timeline of the universe. Cosmic inflation occurs shortly after the Big Bang. Regular inflation only occurs during the time of human society when money is used. Because of the logarithmic scale of the graph, the cosmic inflation period, which is only a tiny fraction of a second, looks much larger than regular inflation, which has existed for at most a few thousand years.

Transcript

[Caption:] Timeline of Inflation
[A log scale timeline marked by "Age of the Universe (Seconds)" at each factor of 1010, ranging from 10-40 to 1020. A bar labeled "Cosmic" begins off-panel to the left and continues up to roughly 10-32 seconds. A second, much thinner bar labeled "Regular" covers another period between roughly 1016 and 1018 seconds.]


      new topic.png  View comic discussion

New here?

Last 7 days (Top 10)

Lots of people contribute to make this wiki a success. Many of the recent contributors above have just joined. You can do it too! Create your account here.

You can read a brief introduction about this wiki at explain xkcd. Feel free to create an account and contribute to the wiki! We need explanations for xkcd comics, characters, What If? articles, and everything in between. If it is referenced in an xkcd comic, it should be here.

  • The incomplete explanations are listed here. Feel free to help out by expanding them!

Rules

Don't be a jerk!

There are a lot of comics that don't have set-in-stone explanations; feel free to put multiple interpretations in the wiki page for each comic.

If you want to talk about a specific comic, use its discussion page.

Please only submit material directly related to xkcd and, of course, only submit material that can legally be posted and freely edited. Off-topic or other inappropriate content is subject to removal or modification at admin discretion, and users who repeatedly post such content will be blocked.

If you need assistance from an admin, post a message to the Admin requests board.