First came BigDog, now Google has introduced a smaller “Spot” robot dog, which can run, climb stairs, all the while being kicked. The 160-pound machine is electrically powered and hydraulically actuated. A sensor on its head helps it navigate over rough terrain – and to spot when humans, or another robot dog, is nearby by, allowing it to follow its owner and run in formation. It’s designed to follow a soldier for 20-miles while carrying 400-pounds of their kit, and if it tips over on rugged terrain, Spot will immediately be able to right itself. You control Spot with a game-like controller, and one soldier has likened the experience to “playing Call of Duty”. Click here to view the first image in today’s viral picture gallery. Continue reading for the five most popular viral videos today, including a virtual walking tour of the USS Enterprise.