Behold! The Car-Size, Six-Legged Crabster

The world's largest and deepest underwater-walking robot, the 1,400-pound Crabster CR200, was designed to scuttle along the seafloor like a monstrous crustacean. Its possible vocations include scientific explorer, commercial surveyor, and treasure hunter. In fast currents too dangerous for scuba divers, it steadies itself on six legs by putting its head down, raising its rear, and facing the flow head-on. It has 11 cameras, including an acoustic one to see through cloudy, turbulent waters. Engin...