In any contraption with moving parts--automotive engines, industrial machines, a countertop juicer--some degree of energy is lost as heat to friction. That loss can range from the relatively small amount lost by a single juicer, to the collectively huge amount lost each day by, say, all of the cars in the world (or all of the industrial machines used to manufacture them). A new nanotech solution could change that via a new lubrication technology that can cut friction by 55 percent.
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.