Imagine a crocodile that would rather sprint than swim. It dashes over dry ground on long, slender legs like a reptilian ...

Prehistoric insects reached sizes far beyond anything seen today, driven by environmental conditions that allowed their bodies to grow larger than modern limits. Higher oxygen levels in the atmosphere ...

Add Yahoo as a preferred source to see more of our stories on Google. Millions of years ago, the earth was ruled by massive animals. Many of these most notable remarkable animals were dinosaurs. Among ...

Some prehistoric environments were far more dangerous than others, with conditions that pushed survival to its limit. In certain regions, multiple large predators shared the same space, leading to ...

The jackalope is mythical, but Wyoming was home to an actual prehistoric rodent with two large horns on its head. The Ceratogaulus is one of the ...

An international team of paleontologists has discovered in the Karoo desert, in South Africa, a new species of prehistoric predator that is revolutionizing understanding of the origin of mammals. The ...

In the third episode of our Dead World video series, National Geographic digital editor Nicholas St. Fleur examines tiny ...