Gastroenterology

Gastroenterology

(alt-text)

"Mostly it means that I'm acutely aware that the kid one table over coughed as the server walked past with our food."

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.