In 1920, we looked at a New Jersey inventor's innovative early hybrid. The electric motor was mounted directly on the rear axle, and a generator charges the batteries while coasting. An optional four-cylinder gas engine up front can kick in for more charging on the road.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.