Pachycephalosaurus

Pachycephalosaurus is a genus of herbivorous ceratopsid dinosaur that lived during the Late Cretaceous period, about 74-65 million years ago. It was a small to medium-sized dinosaur, with a length of about 9-10 meters and a weight of around 1 ton. It is characterized by its thick, heavily-built skull, which was up to 20 cm thick at the front and had a dome-like structure on top. The skull was likely used for head-butting or displaying to potential mates. Pachycephalosaurus had a short, stocky body with short, powerful legs and a long, flexible neck. It had a short, pointed tail and small, blade-like teeth that were likely used for cutting and grinding vegetation. It is thought to have lived in open wooded areas and may have formed small herds.