Mysterious "stone-headed" dinosaur with 25cm thick skull

One of the strangest dinosaurs, Pachycephalosaurus is easily recognized by its unusually thick-domed head.

With a skull up to 25cm thick. The Pachycephalosaurus's characteristic domed head had a layer of bone up to 25cm thick, leading many scientists to believe they used it for headbutting in fights over territory or mates. Photo: Pinterest.

The name means “thick-headed lizard”. The scientific name “Pachycephalosaurus” comes from the Greek: “pachy” meaning thick, “cephalo” meaning head, and “saurus” meaning lizard – accurately describing the most prominent feature of this species. Photo: Pinterest.

Living in the late Cretaceous period. Pachycephalosaurus appeared about 70–66 million years ago, just before the mass extinction event caused by the Chicxulub meteorite. Photo: Pinterest.

Walked on two legs. Like many other herbivorous dinosaurs in the Ornithischia group, Pachycephalosaurus had strong hind limbs and often walked on two legs. Photo: Pinterest.

Small and worn teeth. Pachycephalosaurus teeth were quite small and had heavily worn surfaces, indicating that they were not used for tearing flesh but were more suitable for chewing leaves or soft plants. Photo: Pinterest.

Possibly omnivorous. While most evidence suggests that Pachycephalosaurus ate plants, some scientists believe it may have also eaten insects – making it omnivorous. Photo: Pinterest.

Length about 4.5 meters. The body of Pachycephalosaurus is quite compact, about 4.5 meters long and weighs about 400-500 kg. Photo: Pinterest.

Role in movies and popular culture. Pachycephalosaurus appeared in the “Jurassic Park” series, helping to bring this dinosaur closer to the public. Photo: Pinterest.

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