NASA's Mars Exploration Rover Opportunity, having been on Mars since January 2004, exceeded 25 miles of total drivindg on July 27, 2014. The yellow line indicates Opportunity's route from the landing ... more 
NASA's Mars Exploration Rover Opportunity, having been on Mars since January 2004, exceeded 25 miles of total drivindg on July 27, 2014. The yellow line indicates Opportunity's route from the landing site. less 
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SPACE.com | Photo By NASA/JPL-Caltech/MSSS/NMMNHS
Mon, Jul 28, 2014 6:35 PM EDT