Some experts believe that we're already in a sixth mass extinction event, but given the numbers, others aren't so sure.

Scientists debate whether current extinction rates mark a planet-wide crisis or reflect a more nuanced reality, highlighting ...

Human activity may be setting the stage for the largest extinction event since the asteroid that wiped out the dinosaurs 66 ...

For years, headlines have warned that Earth is entering its sixth mass extinction, but a new study suggests these fears may ...

Study warns that humans may be driving Earth toward a sixth mass extinction. The research shows species loss, but the future ...

The dinosaurs were killed during the Fifth Extinction — which scientists suspect was caused by an asteroid. Now, we are living through an epoch that many scientists describe as the Sixth Extinction, ...

Scientists have documented five major mass extinction events in Earth's history, during which at least three-quarters of life went extinct. But with humans clearing habitats, exterminating species and ...

CNN — The sixth mass extinction is not a worry for the future. It's happening now, much faster than previously expected, and it's entirely our fault, according to a study published Monday. Humans have ...

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 ...