We may not be living through Earth’s sixth mass extinction event ­­— at least not yet. That’s the conclusion of a new analysis of plant and animal extinctions published September 4 in PLOS Biology.

Earth has a long and dramatic history, and one recurring theme is extinction. Did you know that over the last 500 million years, our planet experienced five major mass extinction events? These events ...

Add Yahoo as a preferred source to see more of our stories on Google. Brown dwarfs are stellar misfits — too massive to be planets, too lightweight for nuclear fusion. If Nemesis exists, it’s ...

Humans have wiped out hundreds of species — with many more on the brink or experiencing large declines in population. Some scientists have argued that we have entered a “sixth mass extinction” event ...

One of the persistent claims made across the twentieth century is that humans are causing mass extinction of species, both in rate and numbers, unseen since the end of the age of dinosaurs. I ...