researchers have created a small robotic drone that flies and looks a humming bird. the new robot was developed by aerovironment, backed by DARPA, a division of the US pentagon. the robot is to be used for spying, using the bird-like design as a way to conceal its purpose. although the bird has only been able to fly for 20 seconds, DARPA has just giving its creators 2.1 million USD to build the next iteration. DARPA is hoping to have a tiny drone that is capable of speeds of 10m/s, operable inside buildings and controllable from up to 1 km away. next time you see a cute little hummingbird, be careful what you say.