kkleiner writes "The latest in a line of 'modsnakes' from Carnegie Mellon's Biorobotics Lab, Uncle Sam can move in a variety of different ways, including rolling, wiggling, and side-winding. It can also wrap itself around a pole and climb vertically, and even scale a tree. You have to watch this thing in action. There is something incredibly life-like and eerie about the way it scales the tree outdoors and then looks around with its camera 'eye.' Projects like Uncle Sam show how life-mimicking machines could revolutionize robotics in the near future."