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Science 5 March 2004:
Vol. 303. no. 5663, p. 1450
DOI: 10.1126/science.303.5663.1450
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News of the Week

PLANETARY SCIENCE:
A Wet Early Mars Seen in Salty Deposits

Richard A. Kerr

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.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)