| Traces of manganese found in rocks on Mars could be indicators that there was once oxygen on the Red Planet. |
There are a lot of rocks on Mars, and most of them wouldn’t raise an
In 2013, Mars rover Curiosity identified large amounts of the element manganese in a piece of rock – which, by all accounts, shouldn’t have been there. Now, analysts say the discovery could be proof of a once-oxygenated Martian atmosphere....
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