Mars Rover Churns Up Questions With Sulfur-Rich Soil

Some bright Martian soil containing lots of sulfur and a trace of water intrigues researchers who are studying information provided by NASA's Spirit rover.

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<p><a href="http://www.physorg.com/news93109282.html">Mars Rover Churns Up Questions With Sulfur-Rich Soil</a></p> <p>Some bright Martian soil containing lots of sulfur and a trace of water intrigues researchers who are studying information provided by NASA's Spirit rover.</p>