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Hanging from a network of cables, Brachiator III quickly swings from "branch" to "branch" like the long-armed ape it was modeled on. (Brachiator refers to "brachiation," moving by swinging from one hold to another.) The robot, which was built in the laboratory of Toshio Fukuda at Nagoya University (Japan), has no sensors on its body. Instead, it tracks its own movements with video cameras located about four meters away. Brightly colored balls attached to the machine help the cameras discern its position. Brachiator's computer, which is adjacent to the camera, takes in the video images of the machine's progress and uses this data to send instructions to the machine's arms and legs. From the book Robo sapiens: Evolution of a New Species, page 87.