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(17 Jul 2008 15:32 GMT) - Papers by Brown University scientists show that water on ancient Mars was pervasive and was working hard, changing the minerals below ground and on the surface. The paper in Nature by planetary geologist John Mustard lends the first in-depth look at the various terrains in which water-bearing minerals were present. A companion paper in Nature Geoscience by graduate student Bethany Ehlmann shows a clay-rich delta that may store past life…
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