The teeth from Maryland's Astrodon were cut open in 1858 & revealed this pattern, hence its name
[DOC] [TLE] Dinosaurs: A Concise Natural History [PAR] the natural history of dinosaurs; ideas that will likely change their perception of 
the ..... of dinosaur books as a litany of names, dates, and discoveries, our history 
chapter  a his- .... vestige remains at all, it is usually hard parts: generally, bones 
and teeth.