What if everything we know about T. rex growth is wrong? A complete tyrannosaur skeleton has just ended one of paleontology's longest-running debates—whether Nanotyrannus is a distinct species, or just a teenage version of Tyrannosaurus rex.

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.

A paleontologist was trying to locate the site of a famous 1908 discovery when a rancher in Wyoming shared an important clue.

After nearly 10 years of bringing prehistoric adventures and education to southern Colorado, the Royal Gorge Dinosaur