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Science 10 March 2000:
Vol. 287. no. 5459, pp. 1727 - 1728
DOI: 10.1126/science.287.5459.1727a
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News of the Week

PLANETARY SCIENCE:
Buried Channels May Have Fed Mars Ocean

Richard A. Kerr

A team of geophysicists may have found a missing link in the growing body of evidence that Mars once had a major ocean. On page 1788 of this issue of Science, researchers analyzing gravity data from the Mars Global Surveyor spacecraft report that they have detected a system of now-invisible, buried channels that delivered water from Mars's southern highlands into the northern lowlands billions of years ago. But others warn that the hypothesis will be difficult to test.

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