Perpetual motionW
Perpetual motion
History of perpetual motion machinesW
History of perpetual motion machines
Johann BesslerW
Johann Bessler
Brownian ratchetW
Brownian ratchet
Cox's timepieceW
Cox's timepiece
Garabed T. K. GiragossianW
Garabed T. K. Giragossian
Maxwell's demonW
Maxwell's demon
MethernithaW
Methernitha
Newman's energy machineW
Newman's energy machine
Charles RedhefferW
Charles Redheffer
SteornW
Steorn
Zero-point energyW
Zero-point energy