SALT LAKE CITY — Paleontologists say they have discovered fossils of two new dinosaur species in southern Utah. The plant-eating dinosaurs are closely related to the three-horned triceratops, but one ...

Pachycephalosaurids are known for its species of bi-pedal, dome-headed dinosaurs. The clade -- a group consisting of a single ...

Scientists have long debated whether dinosaurs were in decline before an asteroid smacked the Earth 66 million years ago, ...

A new species of dome-headed dinosaur has been discovered in fossils found in Montana, according to researchers. The dinosaur ...

A fossil site in New Mexico with numerous dinosaurs, including the gargantuan Alamosaurus, dates to shortly before the ...

A trove of specimens from New Mexico may help settle a long-running argument about the diversity of dinosaurs before their ...

A new dome-headed dinosaur species was discovered in Montana, a study released this month shows. Researchers discovered the ...