The Museum of Unworkable Devices is full of fake ‘perpetual motion’ machines.

They are displayed in glass or clear plastic cases with no obvious means for energy input. Observed by visitors daily, they slowly turn, day after day, without diminution of speed, over periods of a year or more, seemingly in defiance of the laws of physics. Sometimes a nice prize is offered to anyone who can puzzle out the precise secret of their operation.

How cool is that?

Posted as part of the Sunday Blog Blow-out!