Just try plugging two bulky AC adapters into the same outlet-it ain't happening. This retrofittable outlet's sockets rotate 360 degrees to accommodate two oversize plugs. Brass nubs on the outside of each socket drum stay in contact with three brass bands, so devices remain powered while you spin. $8
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.