For 150 years, since the first dinosaur was discovered by a country doctor in Sussex, palaeontologists have been finding more and more fossils. But as the dinosaurs filled the world's museums they became mere curiosities - huge constructions of bone and tubular steel to fascinate and amuse children.
Today palaeontologists are looking at these extraordinary creatures and asking: How could they possibly have worked? How did they eat, reproduce and defend themselves? Why did they become extinct?
To answer these questions, Horizon followed two scientists across the plains of Utah in the United States. The extraordinary moon-like landscape offers unique evidence of the dinosaurs' 140-million-year domination of the earth, and of the very strange world in which they lived.

"A surprisingly offbeat and interesting programme" (Daily Mail)
"Fascinating trail across the plains of Utah to find out how these ungainly reptiles managed to dominate the earth" (Sunday Telegraph)