Mars Water: Opportunity Rover Finds Gypsum, 'Slam-Dunk' Evidence That Water Flowed On Red Planet
NASA's Mars Rover Opportunity has found what scientists believe is the most convincing evidence to date that water may have flowed on the Red Planet. The rover, which has been crawling along the Martian surface for 90 months, found what appears to be veins of the mineral gypsum, a hydrated calcium sulfate that on Earth is used to make drywall.
Thursday, December 8, 2011
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