Everyone knows about the extinction of the dinosaurs. A cataclysmic asteroid strike about 66 million years ago (mya) caused the Death of the Dinosaurs. But there’ve been several mass extinctions in the Earth’s history, and they didn’t involve killer asteroids. The worst extinction was caused by a rapid rise in temperature.
Earth’s most severe extinction occurred long before the killer asteroid impact that wiped out the dinosaurs. It happened some 252 mya, and it marked the end of what’s called the Permian Period. The extinction is known as the Permian-Triassic Extinction Event, the End-Permian Extinction, or more simply, “The Great Dying.” Up to 70% of terrestrial vertebrates and up to 96% of all marine species were extinguished during The Great Dying.
How did it happen? Could it happen again?