05-02-2007, 07:14 PM
McKay Wrote:The only way to understand that Mars had liquid water in its past is to suppose that it had a much thicker atmosphere, presumably one made of carbon dioxide. Long ago Mars lost its atmosphere. Where did it go? We think that most of it is tied up now in rocks. It's been turned into carbonate. It's been mineralized.
Mars has no atmosphere, or nothing thick enough to be considered one. It be in the rocks now. Solidified.
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