The GRASP Lab at the University of Pennsylvania is a perennial PopSci favorite. Yeah, yeah, we’ve all seen robotic quadcopter drones before. But these tiny, so-called “nano quadrotors” are kind of blowing my mind right now. Dial the video below up to about 0:40 and you’ll see why.
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.