This graph plots extinction rates of marine animal ... The five peaks show the "Big Five" mass extinction events, when extinction rates sharply exceeded background rates. These occurred at the ...

Though the End-Permian mass extinction event is predicted to have killed off 80% of all life on Earth, new research is ...

Is the biosphere today on the verge of anything like the mass extinctions of the geological past? Could some equivalent of meteorite impacts or dramatic climate change be underway, as humankind's ...

The end-Permian mass extinction, which struck around 252 million years ago, was the most devastating biological crisis in ...

SALT LAKE CITY — Earth has experienced at least five "mass extinction" events throughout its existence, but some species have been able to survive these major shifts. Utah researchers say they ...