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Mars Rover Captures Video of Colorful Dry Ice Clouds Drifting Over Red Planet

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Martian clouds are almost always made of dry ice, or frozen carbon dioxide.

They form these iridescent feathery feathery clouds only at low temperatures and high altitudes.

Curiosity has for several years been climbing Mount Sharp , an 18,000-foot -high volcano that formed at the bottom of the enormous Gale Crater .