News From the Field
Environmental Changes Preceded First Great Rise in Atmospheric Oxygen
September 27, 2007
The history of life on earth is closely linked to the appearance of oxygen in the atmosphere, which scientists think first occurred in significant amounts during a "Great Oxidation Event" some 2.4 billion years ago. However, until now, little was known of environmental changes prior to this event. New findings indicate that significant oxidative changes were occurring in the oceans and atmosphere before the Great Oxidation Event.
University of Maryland
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