Note that Pangaea had already started breaking apart a hundred million years before Tyrannosaurus rex, which lived right at the end of era of non-avian dinosaur

Note that Pangaea had already started breaking apart a hundred million years before Tyrannosaurus rex, which lived right at the end of era of non-avian dinosaurs. Indeed T. Rex is much closer to our time than Pangaea was to T. Rex's time! They lived in what is now Western North America, but was then an island continent called Laramidia [1] so yes, they were geographically quite limited. [1] https://en.wikipedia.org/wiki/Laramidia https://en.wikipedia.org/wiki/Laramidia