For decades robots stumbled along on the ground, slowly and clumsily, rarely achieving even bipedal locomotion. Right now the apex of consumer robotics is that humble domestic trilobite, the Roomba. But it turns out that the earth’s surface is simply not the robot’s natural domain. When robots take to the air, they’re faster and nimbler and more graceful than humans will ever be. All along, robots just wanted to be drones.