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Valuable snapshots of deep time

A regional oxygenation event 1.6 billion years ago coincided with the appearance of large fossils, but whether the availability of oxygen was the primary driver of the diversification of multicellular organisms remains to be seen.

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Fig. 1: Mesoproterozoic macrofossils and indications of free oxygen.


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Correspondence to Emma U. Hammarlund.

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Hammarlund, E.U. Valuable snapshots of deep time. Nature Geosci 11, 298–299 (2018).

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