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Jpl - colder than you

Carbon dioxide is the main ingredient of Mars' atmosphere. The planet also has large reserves of frozen carbon dioxide buried in the polar ice caps. Seasonal buildup and thawing of carbon dioxide frost at high latitudes on Mars have been studied for years and linked to strange phenomena such as geyser-like eruptions and groove-cutting ice sleds .

Saturn’s largest moon, Titan, is known for its active range of volcanoes. But rather than spew lava, these geologic features burp out icy water and methane. They’re called cryovolcanoes , and researchers theorize that these “ice volcanoes” are to blame for methane in Titan’s atmosphere. Methane clouds on Titan, like the one pictured above , resemble the rain and snow clouds found on Earth. They form through cycles of evaporation and condensation. And just like Earth clouds, they precipitate—except with methane instead of water. Hooray for methane snow days !

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