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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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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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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DOI: https://doi.org/10.1038/s41559-021-01404-4