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. 1976 Jul 2;193(4247):47-9.
doi: 10.1126/science.193.4247.47.

How old are the eukaryotes?

J W Schopf, D Z Oehler

How old are the eukaryotes?

J W Schopf et al. Science. .

Abstract

Evidence from Precambrian sediments appears to indicate that nucleated (eukaryotic) organisms had become well established and relatively diverse about 850 +/- 100 million years ago and that eukaryotes were probably extant, and may have first appeared, as early as 1400 +/- 100 million years ago.

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