Although most of the times far less spectacular in size and manifestation than the ones occurring on Earth, natural processes do take place on now-dead Mars. And one of the most common such processes ...
Scientists have cracked a long-standing Martian mystery. Those seasonal gullies on sand dunes that everyone thought were made by water. Turns out, carbon dioxide (COâ‚‚) ice, or dry ice, is the culprit.
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