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Researchers link ancient volcanoes in Siberia to mass extinction
10/3/2017

Scientists say volcanic eruptions caused global warming and other changes in the environment that sparked the extinction of over 90% of species about 250 million years ago. Dramatic increases in the chemical element nickel from cooled magma at the time of the Great Permian Extinction are connected to volcanoes erupting in what is now Siberia, researchers say.

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