German company PC-Aero is trying to win NASA’s CAFE Green Flight Challenge, and Saturday they took a big step toward doing just that. The company’s Elektra One aircraft, designed by PC-Aero’s founder and president Calin Gologan, made its successful first flight. But this one-seater isn’t your average single-prop. Elektra One flies on electricity alone.
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.