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Rise in oxygen levels links to ancient explosion of life, re
http://www.epgeology.com/news-f37/rise-oxygen-levels-links-ancient-explosion-life-t17415.html
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Author:  NewsPoster [ Tue Nov 21, 2017 12:50 am ]
Post subject:  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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