Mars’ ancient atmosphere probably didn’t have much oxygen after all

A new study finds that there may have been no oxygen in the atmosphere of ancient Mars — but don’t despair, organisms could still have crawled across the surface of the planet.

when nasa Curiosity roaming I found manganese oxide At the Martian rocks in 2016, many planetary scientists rejoiced, believing the presence of the mineral was an important hint at past oxygen concentrations in the planet’s atmosphere. Probabilities of life in the past Mars Suddenly it seemed higher, too, since oxygen is one of the main factors that enables life Land.

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