rex by about 6 to 7 million years, and rivals it in size at about 40 feet long. Some paleontologists believe the Tyrannosaurus migrated to North America from Asia across a land bridge. T.

In February, a team of scientists posited that Tyrannosaurus rex was actually three distinct species. Instead of there being only one sovereign “tyrant lizard king,” their paper made the case ...

An old dinosaur debate gained new traction after a new study's findings suggesting that miniature versions of the famed Tyrannosaurus rex may actually be a distinct species. Researchers from the ...