Via A., here’s a cool video about doodling in math class, that somehow keeps circling back to knot theory:

[youtube http://www.youtube.com/watch?v=heKK95DAKms&fs=1&hl=en_US]

This should be required viewing for anyone who doesn’t see what the appeal of math is, or who thinks math is only about numbers and formulas.

My favorite line is the one about the two snakes who can’t talk to each other because one only speaks parseltongue, and the other only Python.