As is the case with everything from seat post to spokes, a helmet is never just a helmet in cycling. While football, baseball and hockey focus on comfort and protection, aerodynamic performance is paramount on the bike. High tech helmets promising to cut through the wind a millisecond faster are launched throughout a year, but the best is saved for the Tour de France. Say hello to the Rudy Project Wingspan Time Trial Helmet.
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.