Pachycephalosaurus skull juvenile Diprotodon their body size decreased over

their body size decreased over time as the Carboniferous progressed and reached the Permian

and in 1943

oreodontes y caballos ancestrales

These horns were probably used in intraspecific confrontations and as a defense against predators

or as additional anchorage for the axial musculature

Pachycephalosaurus skull juvenile Diprotodon their body size decreased overThe skull of Pachycephalosaurus , or "fat headed lizard," is a marvel of paleontology that offers fascinating details about the anatomy and behavior of these herbivorous dinosaurs from the Late Cretaceous period. This distinctive skull features a number of unique characteristics that make it unmistakable. With its thick, rounded bony dome on top of its skull, Pachycephalosaurus likely used its head as a weapon during intraspecific fights or to defend