Summary

For 165 million years dinosaurs roamed and ruled the Earth - and yet we only learned of their existence 150 years ago.

For 165 million years dinosaurs roamed and ruled the Earth - and yet we only learned of their existence 150 years ago. Their huge size, bizarre body shapes and mysterious disappearance seem like some fantasy writer's creation, but the more we know and the more we glean from the clues the dinosaurs left behind, the more powerful their grip on the imagination.