The robot uprising has begun! Seriously, stock up on pipe bombs. Or at least avoid European factories for a while. Last June, a Swedish industrial worker was attacked by a defective machine just outside of Stockholm.
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.