This view from the left Navigation Camera of NASA's Mars Rover Curiosity looks back at wheel tracks made during the robot's first drive toward Mount Sharp on July 4, 2013. The base of Mount Sharp, ... more 
This view from the left Navigation Camera of NASA's Mars Rover Curiosity looks back at wheel tracks made during the robot's first drive toward Mount Sharp on July 4, 2013. The base of Mount Sharp, which lies about 5 miles away, is Curiosity's m less 
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SPACE.com | Photo By NASA/JPL-Caltech
Mon, Jul 8, 2013 10:35 PM EDT