And the camera basically tracks these four fingers and recognizes any gestures that he's making so he can just go to, for example, a map of Long Beach, zoom in and out, etc.

At TEDxRotterdam, Bart Weetjens talks about his extraordinary project training rats to sniff out land mines. He shows clips of his hero rats in action, and previews his work's next phase teaching them to turn up tuberculosis in the lab.

How do you stage an international art show with work from 100 different artists? If you're Shea Hembrey, you invent all of the artists and artwork yourself from large scale outdoor installations to tiny paintings drawn with a single haired brush. Watch this funny, mind bending talk to see the explosion of creativity and diversity of skills a single artist is capable of.