9 Minutes from Manhattan
90 million years back in time

 
 

2017 Season

OPEN LABOR DAY!

10am - 6pm


The park is closed Septmember 5 to September 22.

 

 

Meet our Paleontologists

What does it take to be a vertebrate paleontologist?


Learn More


 

Rules & Manners

 

Dinosaur Etiquette 


    Learn more

PACHYCEPHALOSAURUS-


< Back to All Dinosaurs
 

FAST FACTS

PERIOD: CRETACEOUS
HEIGHT: UP TO 4.5 M
WEIGHT: UP TO 450 KG

How do you say it?

pak-ee-SEF-uh-low-SAWR-us

Discovery:

When:       1950s
Where:      Montana
By Who:    Ferdinand Hayden
 

Fun Facts:

The skull of Pachycephalosaurus was up to 25 cm (10 in) thick.

The thickness of Pachycephalosaurus’ skull lead paleontologists to believe that they may
have used them in battle by slamming head-first into each other, much the same way rams
do today. Other paleontologists think they may have used them to slam into the flanks of
their rivals.


Competition

How did dinosaurs compete?

Most modern animals compete throughout much of their lives. They compete with other members of their own species (intraspecies competition) for food and mates, and they compete with others species (interspecies competition) for food, territory, and survival. Sometimes this competition takes the form of harmless colorful displays, and sometimes it is dangerous, full-on combat. 

Dinosaurs must have competed in the same ways. Many of the strange features we find on dinosaurs, like a Triceratops' frill, or Parasaurolophus' crest, are thought by some to be display structures. Some of the best evidence for intraspecies competition comes form the extremely thick skulls found in Pachycephalosaurus. We believe the used these thick skulls either to ram into each other head on, much like bighorn sheep do today, or by ramming into each other's sides.