Dear Car Talk: Lithium-ion batteries are now smaller and more efficient than ever. Would it be possible for a front-drive, fully electric car to use a generator where the differential normally would ...

To the editor: Making gasoline from carbon dioxide to power your car is a new twist on a perpetual motion machine, which has been a dream for many backyard inventors for centuries. The idea is that, ...

This experiment puts a supposed perpetual motion device to the test. We break down how it works, what physics says should happen, and whether the motion can actually last without an external energy ...

Perhaps the most persistent nonsense in physics: the perpetual motion machine. Bad ideas come and go in physics. But there’s one bit of nonsense that is perhaps more persistent than all others: the ...