Was Mars once teeming with life?
In fact, the carbon levels were comparable to some parts of Earth, albeit desolate ones.
Curiosity used its Sample Analysis at Mars instrument back in 2014, inside of which it baked powdered rock samples, 3.5 billion-year-old mudstone, at high temperatures. The process turned some of the carbon into CO2, which allowed Curiosity to measure carbon isotope ratios, giving scientists insight into the original source of the material."Basically, this location would have offered a habitable environment for life, if it ever was present," said Stern in the statement.
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