Imagine bringing down World of Warcraft enemies with merely an icy stare. A new laptop prototype, developed jointly by Lenovo and eye-tracking specialist Tobii, is the first notebook you can control with your eyes. The 15-inch computer can run gaze-based apps that automatically close when you look away and reopen when you look back, or games that let you aim weapons with your eyes.
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.