Fossils paleontologists initially thought belonged to a juvenile Tyrannosaurus rex actually belong to a new species of ...

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

Paul Sereno and his colleagues spent years painstakingly preparing this Edmontosaurus annectens "mummy" unearthed in Wyoming, dubbed "Ed Junior" because it's a juvenile. The researchers also found an ...