Long before mammals dominated the land and even before the most famous dinosaurs appeared, Earth was home to a wide variety ...

Scientists in Argentina have uncovered the fossil of a powerful prehistoric reptile that once dominated the floodplains of Patagonia. The discovery introduces a new species of crocodile-like predator ...

Millions of years after the last dinosaur roamed the earth, a new generation of killer animals rose to power. The Eocene, between 56-34 million years ago, was ruled not by killer reptiles but by a new ...