NASA's Mars rovers found manganese oxides in Gale's rocks
Shortpedia
Content Team
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When NASA's Mars rovers found manganese oxides in rocks in the Gale and Endeavor craters on Mars in 2014, the discovery led some scientists to suggest that the red planet might have once had more oxygen in its atmosphere billions of years ago. The minerals probably required abundant water and strongly oxidizing conditions to form, the scientists said.
