Long before modern civilization, prehistoric America presented an environment that may have been hostile to early human ...

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 ...

Did mammoths, sabre-tooth tigers and other Ice Age megafauna face a similar, impact-induced fate to the dinosaurs? That’s ...

Environmentalists are suing the federal government over what they say is a failure to protect the horseshoe crab, a ...