1. What did dinosaurs look like? The great French "father of paleontology," Georges Cuvier (1769-1832), established the method of comparative anatomy. This method depends upon knowing the relationship between living creatures and their skeletons. Then, by similar relationships, extinct creatures can be reasonably reconstructed from their fossil (skeletal) remains. For example, both the living hippopotamus and its skeleton is known and from this relationship the extinct hippopotamus (Hippopotmus gorgops) was reconstructed.