By Alexei Oreskovic SAN FRANCISCO (Reuters) - Big Dog, a four-legged robot that can climb muddy hills, and Cheetah, a robot which can outrun the fastest human, are among the robots that now belong to Google Inc. The world's largest Internet search company acquired Boston Dynamics, a privately held company best known for building robots that look as if they belong in a science-fiction movie and which are often co-developed or funded by the U.S. military. The acquisition is the latest by Google's secretive robotics division, led by Andy Rubin, the former boss of the company's Android mobile operating system. Google's new robotics division has acquired more than a half-dozen other robotics companies. Google declined to comment and Boston Dynamics did not return requests for comment.



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