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Study links climate with mass extinction

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A Danish-led international team of scientists has linked climate change with the mass extinction of mammals during the late quaternary era 50,000 years ago.

“Between 50,000 and 3,000 years before present 65 percent of mammal species weighing over (97 pounds) went extinct, together with a lower proportion of small mammals,” said University of Copenhagen researcher David Nogues-Bravo, the study’s lead author. “Why these species became extinct in such large numbers has been hotly debated for over a century.”

The researchers said the world’s climate during the last 50,000 years became colder and drier, reaching full glacial conditions 21,000 years ago. Since then, the climate has become warmer. While both of these global changes played significant roles in species extinction, the researchers said their study reveals changing climate was a significant force driving the mass extinction.


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