From horseshoe crabs to crocodiles, some of these creatures have looked about the same for hundreds of millions of years.

The Jurassic Period lasted from about 201.3 to 145 million years ago. Evolution moved incredibly fast then, as did the creatures it created. In popular culture, we tend to think of dinosaurs as slow, ...

Researchers investigated the Mesozoic Era's atmosphere and vegetation by studying oxygen isotopes in dinosaur tooth enamel. This is a replica of a Stan™ T. rex tooth. Photograph: Thomas Tütken.

A new miniseries, narrated by Morgan Freeman, combines recent fossil research with cinematic reconstruction.

Visit NAP.edu/10766 to get more information about this book, to buy it in print, or to download it as a free PDF. But we mammals did survive. The characteristics we now equate with “mammalness” are ...

Prehistoric animals are often pictured as distant fossils, yet a surprising number of species still walk, swim, and crawl across Earth with body plans that echo deep time. Strictly speaking, ...

It had quite an impact — striking with the force of 10 million atomic bombs. Sixty-six million years ago, the asteroid that slammed into what is now the Yucatán Peninsula caused a mass extinction ...

Being able to spot the Earth, let alone any signs of life on our planet, would require an enormous telescope from 66 million ...

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NEW YORK — If you've seen any of the "Ice Age" animated Disney movies, we have some bad news: You don't know the real ice age. It was an incredible time when the Earth was going through immense ...