An argument over whether fossils from several small dinosaurs represent a juvenile Tyrannosaurus rex or smaller adults of a separate species may finally be settled.

More than 60 million years on from its final day on Earth, there's a dinosaur we owe an apology. Paleontologists confirm that the Tyrannosaurus rex locked in combat with a Triceratops in the famous Dueling Dinosaurs specimen is not a T.

Governor Josh Stein, the North Carolina Museum of Natural Sciences and NC State University announced Thursday that the species, Nanotyrannus lancensis, has been definitively identified in the museum’s “Dueling Dinosaurs” fossil, overturning a long-held belief that the specimen was simply a juvenile T. rex.

But “Tristan,” the T. rex you’ll meet in the Nature of Things doc, The Real T. rex, is very different from the ‘king of the tyrant lizards’ in Jurassic Park. Now scientists have discovered that almost everything we thought we knew about T. rex is wrong.