In ancient times, dinosaurs ruled the Earth. Yet today, all that's left are fossilized remains. Or is it? Are we sure all the dinosaurs are gone? If so, what killed them? Was it the impact of a giant asteroid? A rash of volcanic activity that plunged the Earth into darkness and cold? These are the preferred scientific theories to explain the disappearance of the dinosaurs, but the fossil record may point to a different kind of disaster. But could it be they are not gone forever? And is it possible that man and dinosaurs lived on planet Earth together? Are the dinosaurs still alive today in remote parts of the world? The answers may surprise you.