What they ate: Some ate plants, while others ate animals, including other dinosaurs. How big they were: The smallest dinosaurs were the same size as hummingbirds at only 2 inches (5 centimeters ...

Dinosaurs were big reptiles that lived a long, long time ago. Some were huge and others were small. They lived on land and in the sea, but they are now extinct, which means they don’t live on ...

Think "dinosaurs" and you probably conjure up behemoths ... rock without smashing them to dust—and developed a knack for identifying fossils. Now she runs the dig. She can tell you that the ...

Did dinosaurs lose their dominance suddenly or gradually? Some scientists think the answer lies locked within the remnants of long-dormant volcanoes. Massive beds of ancient lava found around the ...

The 444 million-year-old creature fossilized inside-out, researchers say. Paleontologists are marveling over the unique fossil of a marine species that predated the dinosaurs, according to new ...

Huge meat-eating dinosaurs and their plant-eating prey shared the same watering holes on Skye 167 million years ago, say scientists. University of Edinburgh researchers examined dozens of dinosaur ...

Early mammals had dark inconspicuous fur and only came out at night until dinosaurs became extinct, scientists believe. A study of colouration of mammals that lived in the Mesozoic era – around ...

Ancient mammals that lived in the time of dinosaurs were mostly the same dark-brown colour, according to a new study providing clues about how those mammals evolved as they faced giant predators.