... tyrannosaurus rex fossils included part of an upper jaw and some very sharp teeth which conclusion is best supported by the discovery of these fossils
Answers (2)
It completely depends on your viewpoint. People who believe the scientific view would say they prove dinosaurs existed 65 million years ago and beyond. People who believe the religious view would say they have been created by (a) God (or the Devil) as a kind of trick or a test of faith and that dinosaurs didn't exist because the earth is only a few thousand years old.