Here’s how it works. Paleontologists have discovered the skeleton and radioactive skull of a previously unknown species of Allosaurus. The fearsome two-legged dinosaur sported 80 sharp teeth and ...

The museum’s fossil specimen of Allosaurus fragilis is perched like a nesting bird guarding a clutch of fossilized eggs. Credit: USNM V 4734, Department of Paleobiology, Smithsonian Institution. Photo ...

The Ballad of Big Al is the story of an Allosaurus, a large carnivorous dinosaur ... in the Morrison Formation of North America. The skeleton was unusually well preserved - over 95% of his ...

It has been difficult for scientists to figure out how an Allosaurus skeleton fits together, because often the limbs are cobbled together from several animals. The bones in the Smithsonian's 17 ...