Petri dishes rule!

This post by Tara at scienceborgs is too cool to pass up. One of the commenters even produced the original reference:

Petri, R. J. 1887. "Eine kleine Modification des Koch'schen Plattenverfahrens." Centralblatt fur Bacteriologie und Parasitenkunde, Vol 1, pages 279 - 280 .

Now that is geekdom at its finest.