pachycephalosaurus

the pachycephalosaurus had a thick skull.

paleontologists study pachycephalosaurus fossils.

pachycephalosaurus was a herbivore dinosaur.

the pachycephalosaurus's thick skull may have been used for defense.

pachycephalosaurus lived during the late cretaceous period.

scientists are still learning about pachycephalosaurus behavior.

pachycephalosaurus fossils have been found in north america.

the pachycephalosaurus was a large, powerful dinosaur.

pachycephalosaurus is known for its unique skull shape.

pachycephalosaurus may have used its head to butt rivals.