News of the WeekPlanetary Science

A Wet Early Mars Seen in Salty Deposits

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Science  05 Mar 2004:
Vol. 303, Issue 5663, pp. 1450
DOI: 10.1126/science.303.5663.1450

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WASHINGTON, D.C.-- The Opportunity rover this week stumbled upon strong evidence that eons ago water flowed across Mars, ponded over hundreds of kilometers of the surface, and then returned to the atmosphere, leaving behind a 300-meter-thick layer of minerals leached from the land.