For decades, a small tyrannosaur skull has divided paleontologists over whether it belonged to a separate species or a ...

By Stephen Beech A fossil skull found 83 years ago originally thought to be a teenage Tyrannosaurus rex actually comes from a ...

Paleontologists discovered the skull in the Hell Creek Formation of South Dakota. Courtesy of Sotheby's A massive fossilized skull that once belonged to a Tyrannosaurus rex is hitting the auction ...

The skull, which weighs more than 200 pounds, was expected to fetch between $15 million and $20 million. By Julia Jacobs and Zachary Small This year, one tail vertebra from a long-necked dinosaur was ...