ocr: scientists the most complete picture yet of dinosaur anatomy. Even a casual inspec- tion of this specimen can teach visitors something about dinosaurs. One can see, for example, that the skin of this creature, marked by little bumps called tubercles, was similar to that of an alligator, or to the skin on birds' feet, and that the tubercles were larger along the animal's back and sides and smaller around the joints, which needed to be flexible. No one knows what colors dinosaurs were when they were alive. This specimen was discovered by Charles H. Sternberg (1850-1943). Sternberg worked with hi ...