Relationship Found Between Ancient Climate Change and Mass Extinction

Relationship Found Between Ancient Climate Change and Mass Extinction:

Researchers use a ground-breaking technique that reveals a relationship between cooler temperatures and Earth's second largest mass extinction, which occurred about 450 million years ago...

More at:

http://www.nsf.gov/discoveries/disc_summ.jsp?cntn_id=118671&WT.mc_id=USNSF_1

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