What if everything we know about prehistory is wrong? Journalist Graham Hancock visits archaeological sites around the world investigating if a civilization far more advanced than we ever believed possible existed thousands of years ago.
1 "South Island" July 18, 2011 Bear Grylls must fling himself out of a plane and parachute to safety to reach this remote area. Crossing the country's highest mountain range and starting a fire in a waterlogged forest are jus…