Kohei Minato, a Japanese inventor, has built an incredible new kind of magnet-powered electric motor. As this article on Japan.com explains, "Minato's motors consume just 20 percent or less of the power of conventional motors with the same torque and horse power. They run cool to the touch and produce almost no acoustic or electrical noise. They are significantly safer and cheaper (in terms of power consumed), and they are sounder environmentally." Sounds really great. Until you read down a bit more and get to this line, "it is feasible to attach a generator to the motor and produce more electric power than was put into the device." In other words, it's another perpetual-motion machine. Lots of discussion of this over at Slashdot. (Thanks, James).