Tracing the fate of carbon and the atmospheric evolution of Mars.

Nat Commun · 2015 · PMC4673500 · PMID 26600077

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hedged sentence

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fairly significantno p-value reported

This is a result of simple mass budget balance owing to the fairly significant volcanic outgassing source after 3.0 Ga and insignificant mass loss due to non-thermal escape.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.