Watch a Swarm of Drone `Lightning Bugs` Swirl Overhead
   

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.