At a hacker conference in New York on Friday, a German security consultant demonstrated just how "disruptive" 3-D printing can really be. Using a 3-D printer, the hacker/consultant printed out various plastic copies of handcuff keys for bracelets manufactured by both English and German security firms. Then he used them to easily pop open both sets of cuffs.
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.