Mt Everest - 29,000 feet - the highest point on Earth - captivating and deadly. In the 1920s to conquer Mt Everest was the greatest challenge remaining in a golden age of adventure. Everest was the edge of heaven, where many believed no human could survive. George Mallory dreamed of being the first man to climb Everest but on June 8, 1924, dressed in gabardine and hobnailed boots, he and his fellow climber, Sandy Irvine, were last seen 800 feet below the summit. Seventy-five years after Mallory and Irvine vanished, mountaineer Conrad Anker, took part in an expedition looking for their bodies high on Everest.