Other attempts include a 16th-century windmill, 17th-century siphons, and several water mills. While most perpetual motion attempts have been in the spirit of scientific inquiry, others have aimed ...

Leonardo da Vinci, back in 1494, said: Oh ye seekers after perpetual motion, how many vain chimeras have you pursued? Go and take your place with the alchemists. There was a rumor in the 8th ...