Pachycephalosaurus, skull dome T-Rex or the Arthrodires

or the Arthrodires

100% Ring-spun combed cotton

Mammuthus primigenius was the true Woolly Mammoth

and either simple or forking at outer end

Pachycephalosaurus, skull dome T-Rex or the ArthrodiresPachycephalosaurus, meaning "thick headed lizard," is a genus of pachycephalosaurid dinosaurs. The type species, P. wyomingensis, is the only known species. It lived during the Late Cretaceous Period (Maastrichtian stage) of what is now North America. Remains have been excavated in Montana, South Dakota, and Wyoming. It was an herbivorous creature which is primarily known from a single skull and a few extremely thick skull roofs, though more complete