Curiosity Finds Siderite on Mars

This is a news story, published by Mashable, that relates primarily to NASA news.

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Martian crust

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iron carbonate mineral

Mashable

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Entertainment

A NASA rover just exposed something on Mars that eluded orbiters

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NASA 's Curiosity rover has found siderite, a type of iron carbonate, in rock samples on Mars .

The mineral could be crucial evidence to support the theory that Mars once had a thick carbon dioxide-rich atmosphere, allowing a warm enough environment to support oceans, lakes, and streams.

The study suggests more carbon is stored in the Martian crust than previously thought.

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