It's getting much harder to cheat at sports these days. Urine tests have been re-calibrated to look for the cream and the clear, blood tests check for the presence of excessive oxygen, and you spitballers? Yeah, they're on to you, too. But a new breakthrough in gene therapy may allow athletes to skip the steroids in favor of adding muscles from the DNA up.
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.