The initial queries helped orient the machine-learning system to find prior art on perpetual motion. There’s quite a bit, but ...

Villard’s machine An architect named Villard de Honnecourt drew an impractical perpetual motion machine in the 13th century that was also an overbalanced wheel. His device, and other similar ...

Well, not only is ‘Real or Fake?’ back with a new installment, but this time it concerns everybody’s favorite impossibility: perpetual motion machines! It’s likely that you’ve already ...

I confess that in one sense of the word I am consciously a perpetual-motionist, but not in the sense of believing that any merely mechanical contrivance can produce perpetual motion. That there ...