Debate kicked off in 1988 when a single small tyrannosaur skull discovered four decades earlier was given its own species ...

Nanotyrannus lethaeus was a fast, agile predator distinct from T. rex, with longer legs, stronger arms and a body built for ...

The scientific community has made a discovery that may rewrite decades of research into the most famous predator to ever walk ...

A small dinosaur skull found in Montana 40 years ago was thought to be a young T. rex. Turns out it was a smaller, faster ...

A new look at the "Dueling Dinosaurs" fossil reveals that Tyrannosaurus rex was not the only tyrannosaur roaming the land.

Palaeontologists have argued for decades over whether certain fossils are young Tyrannosaurus rex or another species entirely ...

A groundbreaking study has settled a 40-year debate: the 'tiny tyrant' fossil is not a juvenile Tyrannosaurus rex but a ...

New research suggests that dinosaur populations were thriving in North America before the asteroid impact 66 million years ...