When you hear the word “drone,” you probably think of something either very useful or very scary. But could they have aesthetic value? Autonomous systems expert Raffaello D’Andrea develops flying machines, and his latest projects are pushing the boundaries of autonomous flight — from a flying wing that can hover and recover from disturbance to an eight-propeller craft that’s ambivalent to orientation … to a swarm of tiny coordinated micro-quadcopters. Prepare to be dazzled by a dreamy, swirling array of flying machines as they dance like fireflies above the TED stage. TEDTalks is a daily video podcast of the best talks and performances from the TED Conference, where the world’s leading thinkers and doers give the talk of their lives in 18 minutes (or less).