Permian Extinction

Permian extinction was the biggest extinction we know of.

While there are mass extinctions in the end of many geological time periods, no other one has wiped out so many species.

The Permian mass extinction happened in the end of the Permian Period, about 250 million years ago.

Two Giant Moschops Face Off on a Sandstone Mesa 250 Million Years Ago
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It particularly affected marine animals, and also terrestrical plant eaters. More than 90% of marine, and about 70% of terrestrial species went extinct. It is also the only known mass extinction that included insects.

Plants were less vurnerable than animals. It is not known what caused it, but there are many different theories about global warming, gas fires and coal explosions, and volcanism.

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