Roadrunner

The robot called Roadrunner has only two legs, but it moves amazingly well. Roadrunner uses its powered wheels to move in dual mode, inline mode, and even balances on one wheel. It never needs to turn around, because forward, backward, and sideways are human constructs. Then it can lock its wheels and just walk like a human, which includes navigating stairs and ramps. Can Roadrunner dance? Of course! 

You might wonder what good all this is. Besides the research in kinetic movement, this kind of locomotion would come in handy for wheelchairs and bomb disposal units that need to negotiate rough terrain. Unfortunately, its first real use would more likely be offensive battle. (via Born in Space)