913: Core

Explain xkcd: It's 'cause you're dumb.
Revision as of 04:08, 21 March 2014 by 173.245.54.31 (Talk)

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Core
If you're a geologist or geophysicist and you don't introduce yourself by saying your name, then gesturing downward and saying "... and I study that", I don't know what you're doing with your life.
Title text: If you're a geologist or geophysicist and you don't introduce yourself by saying your name, then gesturing downward and saying "... and I study that", I don't know what you're doing with your life.

Explanation

This comic reflects on the fact that no matter where you are on Earth, its core is always directly under you, while incredibly hot and under huge amounts of pressure. Yet most of the time, we ignore this completely unless there is a volcanic eruption. Randall is presumably reading a geology book with diagrams and various facts about the Earth's interior, such as the core being subdivided into an inner core and an outer core, that the inner core is a solid ball, the size of the moon, that the outer core is at a pressure of 30 million pounds per square inch (approximately 2 million times atmospheric pressure at sea level) and the outer core is made of molten metal in a constant turbulent motion - a bit like a pot of boiling water. How cool would it be to study that? Therefore, Randall suggests if you do study it for a living, make the most of it.

Transcript

[A cutaway diagram of the Earth, with colored layers including a labeled outer core and inner core.]
[A closeup of the stylized outer core, labeled "Turbulent molten metals at 30 million PSI" with turbulence lines, and of the inner core, labeled "moon-sized iron sphere."]
[Cueball reading a book pulls legs up tight under office chair, peering downwards.]
I freak out about fifteen minutes into reading anything about the Earth's core when I suddenly realize it's RIGHT UNDER ME.
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Discussion

And the crust is just thin enough that volcanoes and earthquakes are a thing. Safety! Davidy²²[talk] 01:30, 17 April 2013 (UTC)

Isn't the glancing down and saying "I study that" a reference to something more inappropriate? ~ JFreund

I think that's the joke. NealCruco (talk) 17:27, 17 March 2014 (UTC)

I agree. If you stand with your arm at shoulder height and gesture downwards, saying "I study that", you will be pointing both toward the center of the earth and at your own genitals. That is the joke in the title text. 173.245.52.196 (talk) (please sign your comments with ~~~~)


And if Carlos Saldanha,s documentary is correct, the earth will be filled - FILLED - with velociraptors. 173.245.56.191 15:25, 29 August 2014 (UTC)
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