In this April 18, 2012, photo, Carnegie Mellon University professor Howie Choset stands behind a robot demonstrating how it climbs up a tubular armature at their lab on campus in Pittsburgh. ... more 
In this April 18, 2012, photo, Carnegie Mellon University professor Howie Choset stands behind a robot demonstrating how it climbs up a tubular armature at their lab on campus in Pittsburgh. Scientists and doctors are using the creeping metallic tools to perform surgery on hearts, prostate cancer and other diseased organs. (AP Photo/Keith Srakocic) less 
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Associated Press | Photo By Keith Srakocic
Tue, May 29, 2012 3:02 AM EDT