Many organisms can transition smoothly from one mode of locomotion to another, often by using the same body parts. For example, flying fish use their fins to steer underwater, and these same ...

Drone aircraft are no longer curiosities—they're widely used in recreation, transportation, and even warfare. Most of these flying machines use rotary-wing quadcopter designs, which allow them to take ...

Scientists have built a bird-inspired robot with legs that can walk on the ground, hop over obstacles and jump into flight, an advance that may lead to the development of drones for complex terrains.