Every year, the editors of Popular Science put hundreds of home-brew inventions through a rigorous vetting process. Are they genuine innovations? Do they solve serious problems? Do they have a chance to become real-world products? This year, the process was no less daunting, but at the end, 10 stood above the rest.
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.