The latest version of Honda’s humanoid robot Asimo can perform several new tricks, including the ability to run where during each stride both its feet are in the air at the same time.

Sony’s Qrio robot was the first biped bot to demonstrate the ability to run, in December 2003. It is also capable of mimicking human dance maneuvers with remarkable skill.

Walking on two legs has some advantages over wheeled locomotion. For example, legs would allow a robot to negotiate unpredictable terrain more easily. Another advantage would be that two-legged humanoid robots could navigate the same environment as humans, increasing their usefulness.