| 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
eyebrow. But one in particular has revealed new insights about the ancient Martian atmosphere….
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….