BigDog the Mule

Boston Dynamics has created BigDog the robotic pack mule which according to them is "the most advanced quadruped robot on Earth!" BigDog can carry four infantry backpacks while keeping its balance over different type of terrains. The following freaky video (28MB WMV) shows BigDog walking through mud, over slippery snow, over rocks, up a hill, and even keeps itself from toppling over when it's being kicked! BigDog stands about waist high, can carry 165 lbs (75 kg), can walk through most terrain and can always keep its balance. The on-board computer controls locomotion, monitors external & internal sensors and keeps itself balanced. A gasoline engine powers BigDog's hydraulic system for actuating the hydraulically controlled legs.