An extremely rare pregnant Tyrannosaurus Rex dinosaur skeleton first found in Montana has gone on display, but Americans wanting to check it out for themselves might have quite a journey on their ...

A new specimen of one of the most controversial species of dinosaur has the potential to overturn decades of research on the T rex. Nanotyrannus, the "miniature T rex," has been the center of one of ...

A new analysis of fossils believed to be juveniles of T. rex now shows they were adults of a small tyrannosaur, with narrower jaws, longer legs, and bigger arms than T. rex. The species, Nanotyrannus ...