Until now, estimating how old a dinosaur was when it died has been a fairly simple process: Count up the growth rings in the ...

The “mesozoic cow” was a dinosaur with hundreds of ever-replacing teeth. Here’s how its uniquely adapted skull allowed it to ...

Add Yahoo as a preferred source to see more of our stories on Google. Image of a plant-eating ornithopod dinosaur, Thescelosaurus during the latest Cretaceous Period, nearly 67 million years ago.

Recent digs revealed roughly 20 feet of a long-necked dinosaur's skeleton, and paleontologists suspect even more bones are lurking underground ...

Add Yahoo as a preferred source to see more of our stories on Google. An Olorotitan dinosaur fossil with fractured tail vertebrae has resurrected a theory around how dinosaurs mated. Stocktrek Images, ...

Around 110 million years ago, a dinosaur went hunting. Stalking through ferns along a riverbank, he twitched his nose to the wind and caught scent of a plant-eater ahead. His head darted upward. His ...

It was a cloudy morning in southeast Mongolia. Paleontologist Chinzorig Tsogtbaatar and several colleagues set out by foot from their campsite to a rocky outcrop dating back some 110 million years to ...

Dinosaurs liked it rough — and the fossils they left behind prove it. Top paleontologists have discovered that mating between some species of prehistoric behemoths was so violent that they literally ...