BigDog Quadraped RobotFrom Boston Dynamics (http://www.bdi.com/index.php) comes this odd-looking, gasoline-powered robot that looks like two guys carrying a couch, but acts almost alive. "BigDog is powered by a gasoline engine that drives a hydraulic actuation system. BigDog's legs are articulated like an animal's, and have compliant elements that absorb shock and recycle energy from one step to the next. BigDog is
