Ancient micrometeorites suggestive of an oxygen-rich Archaean upper atmosphere

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Andrew G. Tomkins, Lara Bowlt, Matthew Genge, Siobhan A. Wilson, Helen E. A. Brand, Jeremy L. Wykes Nature 533, 235–238 (11 May 2016) | doi:10.1038/nature17678 LINK “It is widely accepted that Earth’s early atmosphere contained…

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