triceratops I love the triceratop dinosaurs I am often disappointed that most museums display their skulls with the back to the wall This makes it impossible to see that the skull to first vertebra joint was a perfect socket and ball joint The base of the skull has a perfect hemispherical socket for the first vertebra to sit in I spent decades looking at them before I saw the back of one All that time I assumed but did not know that they would be able to quickly turn their heads One glance and it is obvious that my assumption was correct