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Atmospheric science

Ancient air caught by shooting stars

Ashes of ancient meteors recovered from a 2.7-billion-year-old lake bed imply that the upper atmosphere was rich in oxygen at a time when all other evidence implies that the atmosphere was oxygen-free. See Letter p.235

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Figure 1: Possible mechanisms of oxygen enrichment in the Archaean atmosphere.

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Correspondence to Kevin Zahnle or Roger Buick.

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Zahnle, K., Buick, R. Ancient air caught by shooting stars. Nature 533, 184–186 (2016). https://doi.org/10.1038/533184a

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