We don't get many opportunities to write about bobsledding. And while the U.S. Men's team winning the four-man bobsled championships yesterday for the first time in 50 years sounds newsworthy, it's not quite the standard hook for Popular Science readers. But the captain of that winning team, Steven Holcomb, nearly quit the sport last year with a degenerative eyesight disease, until he found a novel eye surgery -- and we're not talking Lasik here. Bobsled here we come.
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.