Those of you who have been paying attention to my recent posts will have pretty much known this was coming.

I was going to write about mystery cervicals of the Cloverly Formation, but that requires knowing something about juvenile vertebrae and Pleurocoelus , so I decided to write about Pleurocoelus , but that still requires knowing something about juvenile vertebrae. So I’m writing this tutorial to lay the groundwork for more goodness to come.

My favorite room in the world is the big bone room at BYU’s Earth Science Museum.