When a scientist received a video of a spotted hyena in the southern part of his country, he thought someone was playing a ...

There were lots of them – and lots of different species – and they held the top carnivore and top herbivore spots in food chains. The oldest bird-like fossils are more than 150 million years old.

A new study reveals the profound ecological effects of wolves and other large carnivores in Yellowstone National Park, ...