Introduction

Throughout Earth’s long history, life has faced several catastrophic mass extinctions. Among these, one stands out as the most devastating: the End-Permian extinction, often referred to as the “Great Dying.” This event reshaped the course of evolution and set the stage for the rise of new life forms.

What Was the End-Permian Extinction?

• The End-Permian extinction occurred about 252 million years ago, marking the boundary between the Permian and Triassic periods.

• It is recognized as the most severe extinction event in Earth’s history, wiping out an estimated 81% of marine species and 70% of terrestrial vertebrate species137.

• This event also caused the greatest known mass extinction of insects and led to the collapse of many ecosystems13.

Causes of the End-Permian Extinction

• The leading cause was massive volcanic eruptions in Siberia, known as the Siberian Traps, which released vast amounts of greenhouse gases and toxic substances126.

• These emissions led to global warming, ocean acidification, euxinia (oxygen-starved, sulfurous oceans), and acid rain, creating hostile conditions for life16.

• Other contributing factors may have included methane release, destruction of the ozone layer, and possibly an extraterrestrial impact16.

Impact and Legacy

• The End-Permian extinction dramatically reduced biodiversity, eliminating entire groups of organisms and paving the way for the evolution of new species.

• It marked the end of the Paleozoic Era and the beginning of the Mesozoic Era, setting the stage for the eventual rise of dinosaurs and mammals37.

The Correct Answer

Given the options:

1. End of Permian

2. End of Cretaceous

3. End of Devonian

4. End of Carboniferous

The correct answer is:

(1) End of Permian

Conclusion

The End-Permian extinction, or “Great Dying,” remains the most catastrophic mass extinction in Earth’s history, fundamentally altering the planet’s biological landscape and influencing the trajectory of life for millions of years to come