Mars Rover Investigates Signs of Steamy Martian Past

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In March 2007 NASAs Spirit rover found a patch of bright-toned soil so rich in silica that scientists proposed water must have been involved in concentrating it. Image credit: NASAJPLCornell
In March 2007, NASA's Spirit rover found a patch of bright-toned soil so rich in silica that scientists proposed water must have been involved in concentrating it. Image credit: NASA/JPL/Cornell

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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