The largest mass extinction event of all time occurred at the end of the:

Question

Quizplus · Accepted Answer

The largest mass extinction event of all time occurred at the end of the Permian period, around 252 million years ago. This event is known as the Permian-Triassic extinction event and resulted in the loss of around 96% of all marine species and around 70% of all terrestrial vertebrate species. It's believed that the event was caused by a combination of volcanic activity, changes in ocean chemistry, and climate change.

The Largest Mass Extinction Event of All Time Occurred at the End