Watch These Quadrocopters Balance And Juggle Long Poles, Like Robotic Clowns

You know that classic trick of balancing a long object on the chin? These quadrocopters can do that too--in mid-air. "Two of the most challenging problems tackled with quadrocopters so far," says Markus Waibel at Robohub, "are balancing an inverted pendulum and juggling balls." It's not clear to me why those are problems that need to be solved, but I'm glad the team at ETH Zurich's Flying Machine Arena is working on them, because this video is awesome. "Inverted pendulum" refers to a balancing a...