Martian Glaciers: Did They Originate From The Atmosphere

The spectacular features visible today on the surface of the Red Planet indicate the past existence of Martian glaciers, but where did the ice come from?

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<p><a href="http://www.physorg.com/news10307.html">Martian Glaciers: Did They Originate From The Atmosphere</a></p> <p>The spectacular features visible today on the surface of the Red Planet indicate the past existence of Martian glaciers, but where did the ice come from? </p>