The world is currently experiencing its sixth mass extinction, with potentially thousands of species lost every year.

The recent claim the long extinct dire wolf was resurrected made headlines around the world. But bioethicists and ecologists say there are ethical concerns.

Big animals are exciting. The largest animal on Earth today is the blue whale which can reach 98 feet long – enormous (and the largest recorded blue whale even hit 110 feet)! But some extinct ...

Species have gone extinct at a much higher rate than is expected with evolution, but some have been found after researchers thought they were gone.

From an Australian frog that swallowed its own eggs to woolly mammoths, scientists could soon bring back long-lost species from the dead.

From prehistoric predators to forgotten giants, some extinct species still have what it takes.

Marc Schlossman’s new book, “Extinction: Our Fragile Relationship With Life on Earth,” reveals animals endangered or extinct due to human threats. The photographer captured images of ...

Global population trends among 71,000 animal species show nearly half are "sliding toward extinction," some of them at alarming rates, a new study warns. Researchers found 48% of the species in ...

What we lose when animals go extinct Animals are disappearing at hundreds of times the normal rate, primarily because of shrinking habitats. Their biggest threat: humans.

In a mass extinction event some 40,000 years ago, Australia lost 90% of its large species, including nearly two dozen kinds of kangaroos. Two theories suggest why.

De-extinction, the science of resurrecting extinct species, is progressing in leaps and bounds. Here are six creatures that researchers could bring back to life — and one they've already revived.

Nature is in crisis, and it's only getting worse. As species vanish at a rate not seen in 10 million years, more than 1 million species are currently on the brink.