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

A remarkable fossil discovery in Australia has reshaped scientists’ understanding of the Cretaceous predator hierarchy, ...

Palaeognaths include emus and ostriches, and can reach 9 feet tall and weigh upwards of 300 pounds. They are more known for ...

Large birds—our closest relations to dinosaurs—are capable of technical innovation, by solving a physical task to gain access to food. This is the first time scientists have been able to show that ...

Does a duck always look like a duck and quack like a duck? Sixty-six million years ago, at the end of the Cretaceous Period, ...