When George Mallory was asked why he was willing to risk his life to climb Mount Everest in 1924 he simply replied "Because it's there." In Nova Video Library: Everest - The Mystery of Mallory and Irvine you are invited to unravel some of the mystery surrounding the success of Mallory and his climbing partner Andrew Irvine, who set off to climb Everest on June 8, 1924. Did they... (展開全部)