A new look at the "Dueling Dinosaurs" fossil reveals that Tyrannosaurus rex was not the only tyrannosaur roaming the land.

Now a research team said there's new evidence that resolves the case. The latest clue comes from a complete skeleton — first uncovered in 2006 in Montana — that scientists say identifies the mystery ...

For years, the "dueling dinosaurs" in a North Carolina museum were believed to be a Triceratops and Tyrannosaurus rex. However, an article published on October 30 in the journal Nature has a different ...

Paleontologists in North Carolina say they have evidence that a tyrannosaur species coexisted with T. rex, a speedy and agile ...