Question 1

How do you say Centrosaurus?

Accepted Answer

Centrosaurus is pronounced sen-TROH-sore-us. Break it into four parts: SEN, like the start of the word sentence; TROH, rhyming with throw; SORE, as in a sore muscle; and then just say US. The stress lands on the TROH syllable, which is the loudest part. A good memory trick is to say it like you are announcing something exciting: sen-TROH-sore-us! Say it three times fast and you will have it locked in.

Question 2

What does Centrosaurus mean?

Accepted Answer

Centrosaurus comes from two ancient Greek words: kentron, which means a sharp point or spike, and sauros, which means lizard. Put them together and you get sharp-pointed lizard, referring to the large single horn on the dinosaur's nose. The species name apertus is Latin for open, describing the large gaps in the neck frill, so the full name Centrosaurus apertus translates as the open-frilled sharp-pointed lizard. Canadian paleontologist Lawrence Lambe chose this name in 1904 when he first formally described the animal from fossils found along the Red Deer River in Alberta.

Question 3

How big was Centrosaurus?

Accepted Answer

Centrosaurus measured about 18 to 20 feet long from nose to tail, roughly the length of a large pickup truck. It stood about 6 feet tall at the shoulder and weighed somewhere between 4,400 and 6,600 pounds, about the weight of a compact car. The single horn on its nose could grow up to about 18 inches long, with a slight hook at the tip. For a horned dinosaur it was not as massive as Triceratops, but it was still a very powerfully built animal, and a herd of them would have been an impressive and intimidating sight.

Question 4

What did Centrosaurus eat?

Accepted Answer

Centrosaurus was a plant-eater, or herbivore. It used its strong, parrot-like horny beak to crop low-growing vegetation like ferns, cycads, and palm-like plants that covered the ancient floodplains of what is now Alberta, Canada. Its teeth were packed into dense rows called dental batteries that worked like scissors to shear through tough plant stems and leaves. Because Centrosaurus was so large and needed so much fuel, it likely spent most of its waking hours eating, moving constantly through the landscape in a herd to find enough fresh vegetation to survive.

Question 5

Where did Centrosaurus live?

Accepted Answer

Centrosaurus lived in what is now the province of Alberta in western Canada, about 76 million years ago. At that time this region was a warm, humid coastal plain along the edge of a vast inland sea called the Western Interior Seaway, which split North America into two landmasses. The landscape was covered in rivers, swamps, and open floodplains lush with ferns, cycads, and conifers. Fossils have also been found at sites in the United States, suggesting Centrosaurus ranged across a fairly wide stretch of ancient western North America.

Question 6

Did Centrosaurus live in herds?

Accepted Answer

Yes, and the proof is extraordinary. In Dinosaur Provincial Park in Alberta, paleontologists have found giant bone beds containing the packed remains of dozens to hundreds of Centrosaurus individuals all mixed together in a single deposit. These sites are thought to represent catastrophic mass deaths, most likely caused by large herds attempting to cross a flooding river during seasonal migrations and drowning in the attempt. No other evidence of dinosaur herd behavior is as dramatic or well-documented as the Centrosaurus bone beds, which provide direct physical evidence of group living.

Question 7

How is Centrosaurus different from Triceratops?

Accepted Answer

Both are ceratopsid dinosaurs with horns and frills, but they belong to different branches of the family. Triceratops had three full-sized facial horns, while Centrosaurus had one large nasal horn and two small eyebrow horns. Triceratops also had a solid frill without large openings, while the Centrosaurus frill had two big gaps called fenestrae and elaborate curved hooks along the edges. Centrosaurus lived about 10 to 11 million years before Triceratops and was noticeably smaller overall. Centrosaurus belongs to Centrosaurinae while Triceratops belongs to Chasmosaurinae, the other main subfamily of horned dinosaurs.

Question 8

Why are there so many Centrosaurus bones in one spot?

Accepted Answer

Scientists believe the massive bone beds in Alberta formed during catastrophic flood events. The leading theory is that large herds of Centrosaurus, possibly migrating seasonally, attempted to cross a river that was swollen and fast-moving from heavy rains. Hundreds or even thousands of animals drowned in the crossing, and their carcasses were carried downstream and deposited together in a low-lying area where sediment eventually buried them. Over millions of years these bones turned to stone, and erosion of the Alberta Badlands eventually exposed them at the surface. It is one of the most powerful lines of evidence we have that large dinosaurs traveled in groups.

Question 9

What did Centrosaurus use its horn for?

Accepted Answer

Scientists believe the horn served several purposes. Display was likely one major function: a larger, more impressive horn would have helped a Centrosaurus attract mates or establish dominance in the herd without needing to fight. The horn may also have been used in shoving matches between rival males, similar to how bison and deer use their horns today. Some researchers suggest it could have helped push aside branches while feeding. Defense against predators like Gorgosaurus was probably also a factor, since a charge from a 3-ton animal would have been dangerous regardless of horn size.

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