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Ancient Clams Reveal How Earth Rebounded From Mass Extinction



Ancient clams discovered by College of Wooster geologist reveal 
how Earth rebounded from mass extinction by John Mangels, 
The Plain Dealer, February 27, 2010

http://www.cleveland.com/science/index.ssf/2010/02/ancient_clams_discovered_by_co.html

Yours,

Paul H.