Mars Rovers Near Five Years of Science and Discovery

(PhysOrg.com) -- NASA rovers Spirit and Opportunity may still have big achievements ahead as they approach the fifth anniversaries of their memorable landings on Mars.

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<p><a href="http://www.physorg.com/news149872296.html">Mars Rovers Near Five Years of Science and Discovery</a></p> <p>(PhysOrg.com) -- NASA rovers Spirit and Opportunity may still have big achievements ahead as they approach the fifth anniversaries of their memorable landings on Mars.</p>