The Ediacaran Period’s odd animals never got their chance to shine, thanks to a precarious drop in oxygen levels about 550 million years ago that triggered the first-ever extinction event. At least, ...

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

It's safe to say that most of us are familiar with the concept of mass extinction. But this is by no means a recent phenomenon. For millions of years, Earth has been through extinction events that ...

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 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.

The end-Permian mass extinction — the most severe mass extinction ever — peaked 252.28 million years ago, reports a new study published Thursday in Science.

Scientists believe an overlap between two eras resulted in one of the earliest mass extinctions -- if not the first among animals By Washington Post Published Aug 02, 2016 4 minute read ...

Humans may be causing mass extinction comparable to major meteor impacts The Associated Press · Posted: May 29, 2014 3:54 PM EDT | Last Updated: May 30, 2014 ...