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Science 3 October 2008:
Vol. 322. no. 5898, p. 32
DOI: 10.1126/science.322.5898.32a
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News of the Week

PLANETARY SCIENCE:
Minerals Suggest Water Once Flowed on Mars--But Where?

Richard A. Kerr

Scientists on the Phoenix mission to the high arctic of Mars announced this week that the rover had found some long-sought soil minerals that are "indicators of liquid water in the past." The catch is that team members can't say for certain when or where the water was liquid.

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