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A Mass Extinction 250 Million Years Ago Seems to Have Had Multiple Causes – ScienceAlert
The end-Permian mass extinction (EPME) was quite the mass extinction event, wiping out 80-90 percent of land and sea species…

The end-Permian mass extinction (EPME) was quite the mass extinction event, wiping out 80-90 percent of land and sea species and researchers have now identified a new contributing factor to this period of devastation.
More informally known as the Great…
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