Lost on Everest

On June 8th, 1924, the British explorers George Mallory and Andrew Irvine disappeared high on Mount Everest, just 800 vertical feet from the summit. Irvine is believed to have carried a camera that final day. The film inside it could rewrite history. Now, a team of elite climbers have new intel on the location of Irvine's body, and a chance to solve Everest's greatest mystery. (National Geographic)