Explain xkcd: It's 'cause you're dumb.
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)