Herpetology

Herpetology

(alt-text)

Birds are Aves, which is part of the clade Theropoda, which is in Saurischia, which is in Dinosauria. Those birds outside our windows are dinosaurs. We can clear out the rest of our brains because we now have the best fact.

What If? is now on YouTube!
Check out the first video for the answer to
“What if we aimed the Hubble Telescope at Earth?”
and follow xkcd’s What If? The Video Series channel to be notified about each new video.