The Unanswered Questions of Dinosaurs

T-Rex and Tyrannosaurus is because that's what I study. It's also there's some of the most fascinating, very, very derived animals with these little puny arms and big leg muscles which allow them to run really fast. They could swallow quite a bit of stuff just whole. And we have hints and clues in the fossil record. We have scars on the bones where tendons attached muscles to bones so we can get some kind of an idea upon the physiology of these animals.