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Vast Ocean Once Covered Half of Mars

Valley network points to rainy, humid ancient planet

By Rob Quinn,  Newser Staff

Posted Nov 25, 2009 2:05 AM CST

(Newser) – A single huge ocean fed by rivers once covered much of the northern half of Mars, according to a new analysis of the planet's network of valleys. The researchers say their computer analysis—which replaces maps hand-drawn from satellite images in the '90s—shows that...   Read full story »

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