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Rise in oxygen levels links to ancient explosion of life, re 
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Joined: Mon Aug 30, 2010 9:56 am
Posts: 20756
Post Rise in oxygen levels links to ancient explosion of life, re
Science Daily Geology

Scientists have found that oxygen levels appear to increase by roughly 80 percent at about the same time as a three-fold increase in biodiversity during the Ordovician Period, between 445 and 485 million years ago.

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Tue Nov 21, 2017 12:50 am
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