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PHYLOGENETICS

Global aerobics before Earth’s oxygenation

Phylogenetic analysis of oxygen-utilizing and -producing enzymes indicates an early emergence of an oxygenated biosphere, providing phylogenetic insight into a question that has more commonly been approached from the basis of fossils and geochemical tracers.

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Fig. 1: A timeline of the key biological evolution events in Earth’s history.

Zohaib Ur Rehman Afridi / Alamy Stock Photo (methanogens); Christopher Boswell / Alamy Stock Photo (cyanobacteria); Ed Reschke / Stone / Getty (eukaryotes); Ben Queenborough / Alamy Stock Photo (animals)

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Correspondence to Noah J. Planavsky.

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Planavsky, N.J., Mills, D.B. Global aerobics before Earth’s oxygenation. Nat Ecol Evol 5, 407–408 (2021). https://doi.org/10.1038/s41559-021-01404-4

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