Running robot MABEL is now the worlds fastest twolegged robot with knees w video

A robot in a University of Michigan lab can run like a human -- a feat that represents the height of agility and efficiency for a two-legged machine.

With a peak pace of 6.8 miles per hour, MABEL is believed to be the world's fastest bipedal robot with knees.

Source:
http://www.physorg.com/news/2011-08-robot-mabel-world-fastest-two-legged.html