Watch Our Favorite Four-Legged Military Robot Hurl A Cinder Block

Playing fetch with BigDog just got a whole lot more fun. And destructive. We've described Boston Dynamics' DARPA-funded BigDog robot as a lot of non-canine things over the years. "The offspring of a bull and a spider," a "robot sherpa" and a "robot pack mule," for example. The latest trick in the rough-terrain robot's bag is decidedly more dog-like: It's learned to play fetch. Except when you play fetch with BigDog, it's the one throwing. Large cinderblocks, to be precise. Using a robotic arm wh...