A couple years ago, the old Cornell physical sciences library was shut down due to budget constrains. They stopped circulation, moved most of the books, etc. However, they left all these carrel desks that are perfect for doing physics homework in the evenings (yay summer classes). At the hands of Cornell students, these carrels have been thoroughly graffiti-ed. Which makes them all the more interesting for studying.
Among all the “call ###-#### for a good time” and sorority and fraternity Greek letters, here’s a doodle that I found particularly entertaining:
This one too: