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"This may not quench all the questions about the exact mechanism of the extinction itself," Co-author Paul Olsen, a geologist at Columbia University's Lamont-Doherty Earth Observatory said. "However, the coincidence in time with the volcanism is pretty much ironclad," Olsen adds.
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March 3 Saint of the Day

St. Katharine Drexel
March 3: Saint Katharine Drexel, Religious (Feast Day-March 3) Born in ... Read More