So, XKCD is one of the web's hottest nerdy webcomics. It has nerdy humor that is funny, even if you don't quite get it. Or, it's just extremely dry and hilarious.
Randall Munroe is a smart and funny guy and it shows in his numerous references that only those into the sciences will get. If you haven't already seen it, head over to:
Here's a little thing I made inspired by this comic: http://xkcd.com/152/