You might not think a paleontologist looking for 66-million-year-old fossils would need to ask a rancher about his great-grandmother's job in the Wyoming badlands. But that's what Paul Sereno, a ...

Few moments in paleontology are as exciting as the discovery of dinosaur eggs. These fragile and ancient specimens offer a ...

Duck-billed dinosaurs belonged to the 'hadrosaurus' category of herbivorous dinosaurs that roamed prehistoric wetlands.

The 67 million-year-old fossils were found in Hell Creek Formation in Montana. Fossils paleontologists initially thought belonged to a juvenile Tyrannosaurus rex actually belong to a new species of ...

This mummified duck-billed dinosaur fossil is a juvenile Edmontosaurus annectens, nicknamed "Ed Jr." (Image credit: Photograph courtesy of Tyler Keillor/Fossil Lab)) Two extremely rare dinosaur ...

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A new study sheds light on how these reptiles become “mummies” and paints a picture of what these ancient animals looked like. Paul Sereno and his colleagues spent years painstakingly preparing this ...

It's known as the "Dueling Dinosaurs" fossil: A triceratops and a tyrannosaur, skeletons entangled, locked in apparent combat right up until the moment of their mutual demise. Even in the Hell Creek ...

What if everything we know about T. rex growth is wrong? A complete tyrannosaur skeleton has just ended one of paleontology's longest-running debates—whether Nanotyrannus is a distinct species, or ...

One of the worst days in the history of life on Earth started like any other. Herds of hadrosaurs with huge head crests and duck bills roamed ancient New Mexico for plants to eat, making sure not to ...