#pachycephalosaur

#pachycephalosaur

Anyone who has ever flipped open a dinosaur book is likely familiar with pachycephalosaurs. These dome-headed dinos are often depicted ramming the tops of their bowling-ball-like skulls into predators or rivals. Yet despite their popularity, pachycephalosaurs continue to puzzle paleontologists in part because fossils of these bipedal herbivores are rare, says Lindsay Zanno, a paleontologist at North Carolina State University.