Yesterday, a robot made history. The X-47B, an experimental drone that flies itself, landed on the aircraft carrier U.S.S George H.W. Bush. Why is that a big deal? Because landing on an aircraft carrier is hard. Both the jet and the ship move fast, and a ship is a tiny spot for pilots to aim for compared with the vast expanse of the ocean. Earlier this summer, the X-47B demonstrated that it could perform a touch and go landing (when the plane touches down, then keeps going). In the latest demo, the batwing plane used a hook to catch a cable on the carrier, so forward momentum wouldn't send it back into the sea, then it stayed put. The demo foreshadows a future of autonomous combat aircraft launched from aircraft carriers.