Animals & Wildlife (Q&A)

Answer:

The 'Permian-Triassic' extinction event is called the 'Mother of all Extinctions' because it was Earth's most severe extinction event. It led to the extinction of up to 96% percent of all marine species and 70%  of terrestrial vertebrate species. It also led to mass extinction of insects as well.57% of all families and 83% of all genera were killed. Because so much biodiversity was lost, the recovery of life on Earth took significantly longer than after other extinction events. It occurred 251.4 million years ago, forming the boundary between the Permian and Triassic geologic periods.

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