Mainly known from a single skull and a few extremely thick skull roofs (at 22 cm (8.7 in) thick), Pachycephalosaurus is estimated to have reached 4.5 m (15 ft) long and weighed 370–450 kg …

Dec 21, 2025 · Pachycephalosaurus, genus of large and unusual dinosaurs found as fossils in deposits of North America dating to the Late Cretaceous Epoch (about 100 million to 65.5 million years ago).

Mar 28, 2022 · The Pachycephalosaurus lived during the late Cretaceous period, about 76 to 65 million years ago, and is the only known species of the genus ‘pachycephalosaurid’. The reptile probably …

Dec 11, 2025 · The Smithsonian’s National Museum of Natural History has acquired a remarkably complete skull of Pachycephalosaurus, a dinosaur famed for its domed head that lived alongside …

Nov 21, 2022 · Pachycephalosaurus is an extinct, plant-eating dinosaur that lived about 76 million years ago. Its name, Pachycephalosaurus, which translates to the “thick-headed lizard,” best describes the …

Oct 18, 2023 · Pachycephalosaurus is a unique dinosaur known for its dome-shaped skull. Learn about its origins, key facts, discovery, and contemporaries.

Pachycephalosaurus walked alongside Triceratops, Ankylosaurus, and Tyrannosaurus rex in what’s now western North America during the Cretaceous period, but all of these animals went extinct when...

Pachycephalosaurus, known as “thick-headed lizard,” had a unique dome-shaped skull and lived in North America during the Late Cretaceous period. Two recognized species, P. wyomingensis and P. …

Oct 10, 2025 · Today Pachycephalosaurus is the type genus of the Pachycephalosauridae,‭ ‬which means that all dinosaur genera similar in form to Pachycephalosaurus are referred to as …

Everyone knows Pachycephalosaurus, that bipedal dome-head that ran around head-butting other dinosaurs all day long, but few people ever stop and give it much thought beyond that.