Landing airplanes on moving ships is no mean feat, but this will be especially true when the airplanes are unmanned. Along with making decisions, autonomous airplanes will have to heed their human counterparts during aircraft carrier takeoff and landing — but can a robot read and understand arm-waving signals?
After 159 days on the International Space Station and a 50-minute reentry, NASA commander Scott Kelly and two Russian flight engineers, Oleg Skripochka and Alexander Kaleri, landed with a gentle thud in rural Kazakhstan on March 16. High winds dragged their Soyuz capsule several feet before it came to a rest.
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.