Arizonasaurus was an archosaur from the Middle Triassic.

"The pace of change we’re seeing today is unlike anything we know of in the past 66 million years," said ecologist Jack Hatfield.

Saving just 1.2 per cent of the Earth's land could prevent all predicted extinctions This would cost just 9% of the subsidies given to the global fossil fuel industry READ MORE: Scientists warn that ...

(CNN) — A cataclysm engulfed the planet some 252 million years ago, wiping out more than 90% of all life. Known as the Great Dying, the mass extinction that ended the Permian geological period was the ...

Around 300 tree species grow in 125 acres of old-growth forest at Barro Colorado Island, Panama. (Photo by Christian Ziegler) (CN) — Protecting biodiversity in even just a tiny percentage of the Earth ...

Tens of thousands of years ago, nearly two dozen kangaroo species vanished, part of a great extinction event. Science reporter Ari Daniel says hundreds of prehistoric teeth may now help ...

Sharks might be the all time bullet-dodging champions. They’ve been around for about 450 million years, longer than trees, longer than the rings of Saturn, and longer than most of the other life on ...

As we move through the Sixth Extinction, it can be beneficial to examine what caused massive die-offs in the past. Lystrosaurus specimens from South Africa have been found that may help clarify what ...

In fact, the last great extinction event in the history of life on Earth could be our fault. Human activities such as habitat destruction, pollution, climate change, and overexploitation of species ...

In a mass extinction event some 40,000 years ago, Australia lost 90% of its large species. New research suggests climate change played a much smaller role than once thought, though not all agree. Tens ...