If you're a fan of clever and fun, you must check out this video from Vi Hart, a self-proclaimed recreational "mathemusician". This video went viral a few weeks ago. In his New York Times profile of her, Kenneth Chang describes her goal to be the Web 2.0 version of the late Martin Gardner, famous for his Mathematical Games columns in Scientific American.

 

Besides being a brilliant introduction to concepts in topology, the video is also a bittersweet tale of a love that can never possibly be.