The most severe mass extinction during the past 500 million years occurred at the end of which geological period?
A) Devonian
B) Triassic
C) Permian
D) Cretaceous

Question

Quizplus · Accepted Answer

The most severe mass extinction during the past 500 million years occurred at the end of the Permian period, around 252 million years ago. It is estimated that up to 96% of all marine species and 70% of terrestrial species went extinct during this event, known as the Permian-Triassic extinction event.

The Most Severe Mass Extinction During the Past 500 Million