"We're finding abundant evidence for alteration of rocks in a water environment," said Ray Arvidson of Washington University, St. Louis, Mo. Arvidson is deputy principal investigator for the rovers' science instruments.
"We're finding abundant evidence for alteration of rocks in a water environment," said Ray Arvidson of Washington University, St. Louis, Mo. Arvidson is deputy principal investigator for the rovers' science instruments.
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