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Environmental changes preceded great rise in atmospheric oxygen |
| Published: September 28, 2007, 4:37 pm |
| Tags: science, atmosphere, environmental changes, oxygen |
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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. [ Full article ] |
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