Contrary to popular belief, the rise of land mammals may not be solely linked to the disappearance of dinosaurs. A study reveals that their transition had begun much earlier, under the influence of ...

More mammals were living on the ground several million years before the mass extinction event that wiped out the dinosaurs, new research has revealed. More mammals were living on the ground several ...

Fossils reveal dinosaurs were flourishing in diverse ecosystems right up until the asteroid impact ended their reign.

Scientists at the American Museum of Natural History investigated old specimens that had been at the museum for decades and ...

A microbiologist named João Pedro de Magalhães has proposed the idea that the reign of dinosaurs forced mammals to speed up their reproductive cycle, eliminating key longevity genes. de Magalhães ...

By Will Dunham WASHINGTON, Jan 30 (Reuters) - It may have been suicidal for a predator to go after a healthy adult Brachiosaurus, a behemoth weighing perhaps 60 tons that was a member of the ...

WASHINGTON -- They just needed some leg room: New research shows the great dinosaur die-off made way for mammals to explode in size -- some more massive than several elephants put together. The ...

WASHINGTON -- New research pinpoints how the torch passed from one dominant creature on Earth to another, from the brutish dinosaur to the crafty mammal. Two studies published Thursday in the journal ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. NEW YORK (AP) — An unusual find in China ...

NEW YORK — An unusual find in China suggests some early mammals may have hunted dinosaurs for dinner. The fossil shows a badgerlike creature chomping down on a small, beaked dinosaur, their skeletons ...