News of the WeekGeochemistry

A Shot of Oxygen to Unleash the Evolution of Animals

Science  08 Dec 2006:
Vol. 314, Issue 5805, pp. 1529
DOI: 10.1126/science.314.5805.1529

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Summary

In two papers published this week, one of which appears online in Science (www.sciencemag.org/cgi/content/abstract/1135013), researchers present geochemical and isotopic evidence that substantial amounts of oxygen first reached the deep sea 580 million years ago, just 5 million years before macroscopic animals make their debut in the fossil record. (Read more.)