Pachycephalosaurus was an herbivore that roamed North America during the Late Cretaceous Period. The skull is adorned with multiple bony projections covering much of the snout and the back of the skull. It also sports a very thick dome. Other than its uniquely developed skull, it was a fairly primitive animal for the time.

The Pachy has been nicknamed 'the Butthead' by Dr. Robert Bakker. There is significant speculation among Dr. Bakker and other paleontologists that the Pachycephalosaurus 'used its head' in romantic displays similar to those seen in big horn sheep and a handful of other modern-day mammals.

Our skull replica is produced from one of the top four Pachycephalosaurus skulls discovered to date.