The US' history goes back thousands of years, thanks to a wealth of archaeological sites that give insight into the first ...

A new study based on mathematical modeling weighs in on the fierce debate among paleontologists over the origins of the king ...

Tyrannosaurus rex evolved in North America, specifically in Laramidia, the western half of the continent.

Fossils of the T. rex, tyrant lizard and queen of the dinosaurs, are found exclusively in North America. Strangely, they have ...

A new study suggests that ancestors of the Tyrannosaurus rex migrated from Asia to North America 70 million years ago. Here's ...

Tyrannosaurus rex evolved in North America, but its direct ancestor came from Asia, crossing a land bridge connecting the ...

Tyrannosaurus rex evolved in North America, but its direct ancestor came from Asia, crossing a land bridge connecting the continents more than 70 million years ago, according to a new study.

Being better able to tolerate cooler temperatures than their rivals, tyrannosaurs grew larger to become the apex predators of ...

The findings shed light on the long-standing debate among ... rex likely came to North America from Asia, crossing the Bering Strait between what is now Siberia and Alaska," Morrison added.

Around 70 million years ago, Earth’s largest predators were dominating continents, driven by an extraordinary evolutionary ...