The Undiscovered Secrets of Petra

The ancient Nabatean city of Petra lies in the barren desert of southern Jordan. Its ruins, spread across an area of over one square mile, include temples, a great theatre and hundreds of tombs built into the desert's rocky cliffs. Today, Petra attracts tourists in their thousands. But it also holds a mystery that has long puzzled historians. What could have led such a grand and elaborate city to be abandoned? After studying the latest evidence, Dr Tom Paradise proposes a new theory about its demise.