Leaning back in his chair, graduate student Jerry Pratt controls Spring Flamingo, a walking robot at the MIT Leg Lab in Cambridge, MA. A branch of MIT's renowned Artificial Intelligence Lab, the Leg Lab is home to researchers whose subjects run the gamut from improved artificial legs to robots that help scientists understand the complex dynamics of the human stride. Tethered to a slightly counterweighted boom that rotates around a pivot, the robot always walks in a circle in the lab.From the book Robo sapiens: Evolution of a New Species, page 8-9..