Surfing big breakers is cool and all, but wouldn’t catching lazy rollers be more fun at speeds topping Mach One? A CalTech researcher and a few colleagues put together a few videos showing that it is indeed possible to shred shock waves. Well, in theory anyhow. Using nylon balls, one larger than the other, the researchers demonstrated how one object can ride on the shock waves given off by another.
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.