A new study published by researchers at North Carolina State University claims that many fossils previously believed to be juvenile T. rexes actually belong to a completely different species— ...

A remarkable fossil discovery in Montana may redefine our understanding of Tyrannosaurus rex, revealing that what was once ...

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

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 analysis of a fossil unearthed in 2006 provides a fresh line of evidence that a separate tyrannosaur lineage called Nanotyrannus lived alongside the famous T. rex ...

For decades, paleontologists have argued over one mystery: was Nanotyrannus a real species, or just a teenage Tyrannosaurus rex? Now, a new fossil has finally ended the debate—and rewritten the story ...