Mars used to have oxygen-rich atmosphere
Data collected from Mars suggests that the red planet used to have an oxygen-rich atmosphere.
The evidence comes from the analysis of Martian rocks by NASA’s Curiosity rover.
The spacecraft detected manganese oxide in the rocks, which shows that Mars once had abundant water and oxygen.
The findings can be indicative of the potential habitability of the red planet.
The current atmosphere on Mars is 95 percent carbon dioxide and 3 percent nitrogen, with trace amounts of oxygen. This composition is poisonous to life.
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