Humans increased species extinction rate by 1,000 times, new study says

May 29, 2014 11:03 PM

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Humans increased species extinction rate by 1,000 times, new study says

Plant and animal extinctions are occurring at a rate of at least 1,000 times faster than the time before humans, a new study says.

In the study, published Thursday by the journal Science, lead author and biologist Stuart Pimm of Duke University and colleagues, calculated a “death rate” of species going extinct each year out of 1 million. On a pre-human earth, the death rate was 0.1, but that number spiked to between 100 to 1,00...

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