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Science 26 March 2004:
Vol. 303. no. 5666, p. 1957
DOI: 10.1126/science.303.5666.1957b
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News of the Week

MARS:
Opportunity Tells a Salty Tale

Richard A. Kerr

The latest word from the Mars Opportunity rover is that a sea of sorts once covered a large region on the equator of ancient Mars.

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