Barry Lee was sitting at his desk one day when his boss at British retailer Toolstation stopped by with a new assignment. He had heard about a drag-racing series for vehicles propelled by power tools, and he wanted to win. “You’re the man to do it,” he told Lee, an IT support manager. Three years, countless man-hours and several versions later, Lee finished Bolt Lightning, a disc-cutter-powered dragster with one speed: fast.
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.