Fifty thousand years ago, North America was home to towering giants. Mammoths roamed the tundra, saber-toothed cats hunted in ...

The catastrophic event that ended the reign of the dinosaurs 66 million years ago left an indelible mark on Earth’s history.

Studying human evolution involves piecing together scattered clues about how we survived against tough odds. One of the ...

The secret to their longevity could help conservationists better protect species today threatened by extinction.