In the video below, you can see Atlas opening a push door to exit a building to take a stroll through the snow. Overall the robot handles the rough terrain quite well and you can see how good it reacts to situations where it almost loses its balance. After this, you can see Atlas lifting 10lbs boxes onto a shelf and how the robot recovers from abuse like getting smacked to the floor by a Boston Dynamics employee.
A new version of Atlas, designed to operate outdoors and inside buildings. It is specialized for mobile manipulation. It is electrically powered and hydraulically actuated. It uses sensors in its body and legs to balance and LIDAR and stereo sensors in its head to avoid obstacles, assess the terrain, help with navigation and manipulate objects. This version of Atlas is about 5' 9" tall (about a head shorter than the DRC Atlas) and weighs 180 lbs.
Google X acquired Boston Dynamics in 2013.