=== Anatomia ===
Il Pachicefalosauro aveva una testa dalla forma vagamente a cupola.
Nella sua Pachycephalosaurus was a dome- headed dinosaur. Its huge head housed an incredibly thick skull, a tiny brain, and large eyes. Its rounded skull was up to 10 inches thick (25 cm).
Pachycephalosaurus grew to be about 15 feet long (4.6 m) and may have weighed roughly 950 pounds (430 kg). Pachycephalosaurus probably had a good sense of smell. It had bumpy knobs on its snout and along the rear of its skull. This plant-eater had short forelimbs and a stiff tail (which had a distinctive mesh of interwoven tendons surrounding its rear portion).
=== Come erano? ===
The Pachycephalosaurus was 15 feet long. It stood on two legs and had two short arms with five fingers each. However, the most notable thing about its appearance was the large dome on top of its head. This skull was almost a foot thick. It was covered with armor and spikes.
=== Cosa mangiavano? ===