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End-Permian mass extinction was not so massive By Belinda Smith, Cosmos Magazine https://cosmosmagazine.com/palaeontology/mass-extinctions-were-not-so-massive-study "US paleontologists states once the dust settled following the 'great dying' around 250 million years ago, nearly 20% of species remained – not 4%. Belinda Smith reports." Paleontologist suggests 'great dying' 252 million years ago wasn't as bad as thought, October 4, 2016 http://phys.org/news/2016-10-paleontologist-great-dying-million-years.html The paper is: Stanley, S. M., 2016, Estimates of the magnitudes of major marine mass extinctions in earth history. Proceedings of the National Academy of Sciences, US, vol. 113 no. 42 E6325-E6334 http://www.pnas.org/content/113/42/E6325 Yours, Paul H.