New evidence suggests volcanoes caused biggest mass extinction ever

Researchers say mercury buried in ancient rock provides the strongest evidence yet that volcanoes caused the biggest mass extinction in the history of the Earth. The extinction 252 million years ago was so dramatic and widespread that scientists call it ‘the Great Dying.’ The catastrophe killed off more than 95 weiter …

Source:: https://www.sciencedaily.com/releases/2019/04/190415122249.htm

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