Jane, long thought to be a juvenile Tyrannosaurus rex, has been reclassified as a new species called Nanotyrannus lethaeus, according to a recent study by researchers Dr.

Scientists have long puzzled over the origins of a mysterious dinosaur excavated in the 1940s: Was it a young T. rex or another type ...

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 new analysis of a fossil unearthed in 2006 provides a fresh line of evidence that a separate tyrannosaur lineage called ...

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 ...

New research has identified a dinosaur "mummy zone" in a series of ravines near Lusk, Wyoming. It's produced two mummies of a fleshy dinosaur with ...

The debate over Nanotyrannus’ identity is finally over. A remarkably preserved fossil proves it was a mature species, not a teenage T. rex. This discovery rewrites how scientists understand ...

For many years, paleontologists have debated about whether there was a smaller relative of the Tyrannosaurus rex, or if those smaller fossils were really just awkward teenage versions of the king of ...

A fossil once locked in prehistoric combat has just rewritten one of paleontology’s longest-running debates — and upended what scientists thought they knew about Tyrannosaurus rex.

Paleontologists have examined an exceptionally well-preserved, near somatically mature tyrannosaur skeleton from the Hell Creek Formation of Montana.

Scientists have long debated whether a mysterious dinosaur excavated in the 1940s was a young T. rex or a distinct species.