The Earth has gone through many major events over the course of hundreds of millions of years. Some of the most significant ...

Since the first sharks emerged in the world’s oceans nearly half a billion years ago, the world has gone through five major ...

Earth’s largest mass extinction, often referred to as the “Great Dying,” occurred about 252 million years ago. Massive volcanic eruptions triggered catastrophic climate changes that altered ...

Experts have put the normal extinction rate for the planet at between 0.1 and 1 species per 10,000 species/100 years. A mass extinction event is quite different.

The Cretaceous-Paleogene mass extinction, occurring approximately 66 million years ago, represents one of the most dramatic biotic crises in Earth’s history.

The term Sixth Extinction has been in circulation since 1996 when anthropologist Richard Leakey and science writer Roger Lewin popularized it in a similarly titled book.