This “spherical flight vehicle,” reportedly a prototype for the Japan Self-Defense Forces, has a single rotor and is said to be capable of 40 mph flight. And as the video shows, it’s quite nimble. The catch? An 8-minute battery life. But the idea of enclosing the whole thing in a spherical frame so it can maneuver and land heedless of the orientation of the blades is pretty brilliant. More deets at