The act of deception is probably as old as civilization — not long after humans began communicating, they began communicating lies. Shortly after that, they probably started trying to force others to tell the truth. Modern technology has given us a few options in this arena, from dubious polygraphs to powerful drugs — and now a new study suggests brain interference can work, too.
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.