Large meat-eating dinosaurs took on the role of multiple species while growing up, resulting in a shocking lack of ecological diversity during the Mesozoic, according to new research.

A study released this week shows how the tyrannosaurus consumed different resources at multiple stages of growth. Modern meat-eating mammals can easily be arranged in a chart showing average adult ...

An enormous carnivorous dinosaur that once roamed North America kept Tyrannosaurus rex from achieving its potential for millions of years, a new discovery suggests. The new dinosaur, dubbed Siats ...

My heart is racing when I look down the sight of my crossbow at a Tyrannosaurus Rex less than 100 meters away. All I can see is an enormous shadow, like something out of an old horror movie, obscured ...

A century ago, scientists unearthed fossils of a gigantic carnivorous dinosaur bigger than Tyrannosaurus rex in the Sahara desert, but until recently, paleontologists thought the fearsome beast was ...

Paleontologists in Argentina have discovered a new species of dinosaur, with disproportionately short arms like those of Tyrannosaurus rex. A fossil of Meraxes gigas, as the new dinosaur has been ...

A deep dive into dinosaur data suggests that teenage T. rexes and other juvenile carnivores shaped their ecosystems. By Cara Giaimo Adolescence is a time of great change for most of us. But it was ...