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Whiffs from cyanobacteria likely responsible for Earth's oxy
http://www.epgeology.com/news-f37/whiffs-from-cyanobacteria-likely-responsible-for-earth-oxy-t10511.html
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Author:  NewsPoster [ Tue Nov 24, 2015 4:04 pm ]
Post subject:  Whiffs from cyanobacteria likely responsible for Earth's oxy

Science Daily Geology

Earth's oxygen-rich atmosphere emerged in whiffs from a kind of cyanobacteria in shallow oceans around 2.5 billion years ago, according to new research.

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