Harvard graduate student Pratheev S. Sreetharan and professor Robert J. Wood. Dubbed the PARITy (Passive Aeromechanical Regulation of Imbalanced Torques), it's only five millimeters long and, while such a tiny thing would evaporate if mounted between the rear wheels on a Mustang GT, it's destined for rather smaller applications: tiny, winged micro air vehicles. The scientists proved its effectiveness by clipping one wing on a PARITy-equipped drone and, despite the imbalance in lift surface, the robo-bee maintained level flight -- differential automatically flapping the tinier wing more quickly to compensate. You know what that means: keeping our robot overlord's spies grounded just got a little bit harder.