The femur shows distinctive traits observed exclusively in ceratopsians, confirming their existence in the Middle Jurassic.

Studies of the horns, spikes, plates and clubs of dinosaurs could help settle a long-standing debate over their function ...

ST. GEORGE — The St. George Dinosaur Discovery Site is starting a new dig in an area where dinosaur bones were previously found, and experts hope it will reveal new insights into the state's ...

Evidence from fossilized bite marks suggests that it hunted both solitary and herd-based prey, including ceratopsians and other large dinosaurs. By Eric Snively , Haley O’Brien, Donald M. Henderson, ...

Horseshoe crabs have existed since before the dinosaurs. With their hard exoskeletons and blue blood rich in copper, they have remained unchanged for nearly 450 million years. Their blood is highly ...

How do scientists study the behaviour of dinosaurs, who died 65 million years ago? After all, dinosaur fossils are rare enough as it is, and most are fragments and difficult to work with.

Coronary artery disease (CAD), or the narrowing of the coronary arteries, is the leading cause of morbidity and mortality throughout the world. Atherosclerosis, or the buildup of plaque in the ...

Theropods are classified as carnivorous dinosaurs that are able to walk on two legs with hollow, thin-walled bones and usually small forelimbs – the tyrannosaurus is a famous example.

Even though Tyrannosaurus missed Apatosaurus by many millions of years, the tyrant still had a chance to feed on long-necked giants Though the Age of Dinosaurs ended long ago, less time separates ...

Scientists have uncovered a hidden layer of visual communication in birds-of-paradise—biofluorescence. Nearly all species in this group glow under UV light, with ...

Yet the origin of these remarkable structures predates birds. Feathered dinosaurs were first reported in the 1990s, but many mysteries remain about how and when feathers emerged. Did all dinosaurs ...

One fateful day 66 million years ago, the dinosaurs — which had inhabited Earth for about 165 million years — got a nasty surprise: A roughly 9-mile-wide (15 kilometers) asteroid crashed into ...