Mars Rover Investigates Signs of Steamy Martian Past

Researchers using NASA's twin Mars rovers are sorting out two possible origins for one of Spirit's most important discoveries, while also getting Spirit to a favorable spot for surviving the next Martian winter.

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<p><a href="http://www.physorg.com/news116612518.html">Mars Rover Investigates Signs of Steamy Martian Past</a></p> <p>Researchers using NASA's twin Mars rovers are sorting out two possible origins for one of Spirit's most important discoveries, while also getting Spirit to a favorable spot for surviving the next Martian winter. </p>