Bill Christensen of Technovelgy.com submitted a story about a cockroach-controlled mobile robot. Built by Garnet Hertz, the robot is controlled by a giant Madagascan hissing cockroach. The roach is suspended above a sensor similar to a trackball. As the roach runs, the sensor ball moves, causing the robot to move in the same direction. Impact sensors on the robot flash LEDs arranged in front of the roach, prompting it to move away from the obstacle. For a more detailed account of the project, see Garnet's thesis, Control and Communication in the Animal and the Machine.