It’s a stark reminder of how climate change is reshaping entire ecosystems. Scientists' stunning observation of hybrid ...

Some were the size of a dog. Others were as large as polar bears. A newly-discovered fossil of the ferocious hyaenodont is ...

Most people assume the grizzly bear is the most dangerous predator in Yellowstone, but the truth is far more surprising!

The species, known as Bastetodon and named for an Egyptian goddess, had sharp teeth and an incredibly powerful grip ...

A remarkably intact skull of this leopard-sized mammal reveals a new member of the fearsome hyaenodonts, and re-evaluates an ...