GALLERIES: For the past ten years, Mars Rovers, Spirit and Opportunity, sent back scientifically significant and extraordinarily beautiful images of Mars. Here are ten of the best. They're currently ... more 
GALLERIES: For the past ten years, Mars Rovers, Spirit and Opportunity, sent back scientifically significant and extraordinarily beautiful images of Mars. Here are ten of the best. They're currently on display at the National Air and Space Museum in Washington, D.C. less 
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Wed, Mar 12, 2014 10:20 AM EDT