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Mars Had Liquid Water On Its Surface. Why Scientists Think It Couldn't Hold Onto It

22 Sep 2021, 12:20 UTC
Mars Had Liquid Water On Its Surface. Why Scientists Think It Couldn't Hold Onto It
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A new study indicates that the relatively low mass of Mars allowed most of its water to be lost to space billions of years ago, rather than retained on its surface. (Image credit: NASA/WireImage)

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