University of Arizona robotics engineers
Theresa Klein and Anthony Lewis published a
paper in the July 2012 issue of Journal of Engineering on their robot Achilles that has mastered the art and science of walking. Achilles doesn't just walk like a human though, the the robot has neural and musculoskeletal features that are based on human biology and mobility as well. That's one small step for man, one giant leap for robots.
Below is a video of Achilles in action:
