Defying gravity is a matter of perspective

Kokichi Sugihara has invented a way to trick our eyes into believing that gravity can be defied. He doesn't use magnets or trick photography or special editing. He's made a model with cardboard that takes advantage of the assumptions our brains make about reality. In the following short video it looks like balls are rolling uphill. Click here to see Impossible Motion.

Sugihara teaches at the Meiji Institute for Advanced Study of Mathematical Sciences in Japan. See more of Sugihara's illusions in a longer video

here.