Ouch! Injuries have been found on Pachycephalosaurus’ skull which shows that these creatures had a tendency to have head-butt duels.Palaeontologists predict it would have likely been between males who were fighting over territory, hierarchy, and mates.Eugy creatures are our friends from nature made from biodegradable materials – coloured with eco-friendly ink – put together with non-toxic glue, 3D and collectable.