Mars Water Debate Rages
By Larry O'Hanlon, Discovery News
http://dsc.discovery.com/news/briefs/20021021/marsdebate.html

Oct. 23, 2002 There's no end in sight for the debate over whether Mars was once wet, warm and Earth-like, or forever a frigid world where water never had a chance to thaw and flow.

In the latest foray, Mars researchers Sarah T. Stewart of the California Institute of Technology and Francis Nimmo of NASA Ames Research Center argue not only that the gullies running down crater walls must have been created by water, but that the alternative theory of carbon dioxide eruptions is too unwieldy and unlikely.

They make their case in the latest issue of Geophysical Research Letters.

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Note: The Stewart and Nimmo paper was published in JGR-Planets, not GRL, though I suspect most laypersons would not grasp the difference.

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Alex R. Blackwell
University of Hawaii