Published on Apr 19, 2010
Six million years ago the continents of Africa and Europe collided to close the Strait of Gibralter. Starved of water, the Mediterranean Sea evaporated to form a vast desert. The legacy of this vanished ocean? A million years’ worth of salt deposited in mines half a kilimetre beneath the island of Sicily. Extraordinary footage taken from the ground-breaking BBC series Earth: The Power of the Planet.