For nearly 20 million years, megalodons prowled the world’s oceans. The massive creatures, which could grow up to 80 feet long and weighed about 94 tons, used their large teeth and strong jaws to ...

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 ...

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 ...

Shark teeth found in 5-million-year-old whale skulls provide direct evidence of ancient feeding behavior and predator-prey ...

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

In northeastern Brazil, a fossil that had quietly sat in a museum for decades has now rewritten a small part of the history of life on Earth. Scientists discovered a new species of flying reptile ...

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