Origami flying robots are here! These could be the stuff of nightmares — if they weren’t so damn cute. Scientists at the University of Washington have developed adorable little electronic “microfliers,” the size of a postage stamp, that fold like origami paper in midair to change their flight pattern. The origami micros weigh less than a nail and come fully equipped with all the hottest options: a programmable microcontroller, a Bluetooth radio, a solar power-harvesting circuit, a pressure sensor to estimate altitude and a temperature sensor. When dropped from a drone or other high-altitude object, the microfliers depend on the wind to disperse. When the origami base is fully open, the wind catches them and moves them like an autumn leaf. But when the time comes for them to drop straight down, the operators send a signal to the micros via Bluetooth, or an onboard timer. Then the micros use their Miura origami fold — a specific type of origami folding pattern — to tighten into a smaller size, which helps them plunge downward.