If you've seen the board-breaking power of a professional martial artist and thought it looked superhuman, don't worry: for a while now science couldn't fully explain it, either. The punches delivered by a top-notch fighter are so tough that muscle strength alone can't account for them. But researchers from Imperial College London and University College London have discovered that a unique brain structure could be what gives experts fists of fury.
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.