Of all the reasons exoskeletons aren't widespread, weight is one of the biggest. Even the slickest designs still tend to need bulky machinery. Not at Carnegie Mellon University, however -- its researchers have developed an exoskeleton clutch mechanism that barely weighs anything. Their Electroadhesive Clutch, as the name suggests, relies on electrostatic adhesion between specially coated electrode sheets to control spring movement. At 0.05 ounces per pair, it's 30 times lighter than existing clutches, and uses up to 750 times less power. Even if you had hundreds of clutches, the robotic assistance would take a huge strain off your body. And did we mention that there's three times as much torque density?