The only way scientists can study dinosaurs is by their fossils. Bill Nye gives his spin on dinosaurs and theories about their extinction in Bill Nye the Science Guy: Dinosaurs. The big creatures didn't leave much else behind, but the bones tell interesting stories. Drawing on his experience as a stand-up comic, Nye keeps his show light, but the science instruction is formidable. He shows how the dinosaur bones were protected by substances such as mud or sand, and explains the process by which they absorbed minerals.
Disney Educational - Bill Nye The Science Guy - Dinosaurs