Growth rings in fossilized bones suggest the diminutive dinosaur, Nanotyrannus, would never grow up to become a T. rex — plus ...

Jane, long thought to be a juvenile Tyrannosaurus rex, has been reclassified as a new species called Nanotyrannus lethaeus.

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

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

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

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 ...

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 ...

The discovery, made in collaboration with North Carolina State University, is based on the “Dueling Dinosaurs” fossil, which was found in the Hell Creek Formation in Montana.

A new study reveals that fossils once believed to belong to a teenage Tyrannosaurus rex may actually belong to a separate species ...

A new specimen of one of the most controversial species of dinosaur has the potential to overturn decades of research on the ...

For many years, paleontologists have debated about whether there was a smaller relative of the Tyrannosaurus rex, or if those ...