News of the WeekGeochemistry

Great Oxidation Event Dethroned?

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Science  17 Apr 2009:
Vol. 324, Issue 5925, pp. 321
DOI: 10.1126/science.324.5925.321a

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New laboratory results reported on page 370 of this week's issue of Science challenge the view that the atmosphere of early Earth was devoid of oxygen by showing how supposed signs of an early lack of oxygen could have come from unrelated geochemical reactions.