From Single Cells to <i>Homo Sapiens</i>: Refining the Timetable of Evolution (1 of 2) (IMAGE)

American Association for the Advancement of Science (AAAS)

From Single Cells to <i>Homo Sapiens</i>: Refining the Timetable of Evolution (1 of 2)

Caption

Fossil images (left to right). Stromatolites, layered sedimentary rocks formed by cyanobacteria, found in Australia; an early eukaryotic microorganism found in Australia; an organism from the Ediacaran period found in Namibia. This study proposes that over Earth's four billion year history, ecosystem-altering events largely controlled the pace of evolution. This material relates to a paper that appeared in the May 17, 2017, issue of Science Advances, published by AAAS. The paper, by A.H. Knoll at Harvard University in Cambridge, Mass., and colleagues was titled, "The timetable of evolution."

Credit

[Credit: Knoll <i>et al.</i> Sci. Adv. 2017;3:e1603076]

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