A Rare Look at a Pachycephalosaur Vertebra 🦴🦖 This isn’t just any fossil—it’s a pachycephalosaur vertebra from the Aguja Formation of Texas, a rare find from a dinosaur best known for its thick, domed skull. These herbivores roamed during the Late Cretaceous, likely using their reinforced heads for display, competition, or even combat. This piece was found and prepared by Matthew Harrell of Minute Man Fossils, and it’s now part of the FossilEra collection. A killer addition to any serious foss