Discover the world's largest mountain and the highest peak in the world. "Everest, the death zone": In the wake of the 1996 disaster that took eight climbers in a single day, scientists follow a team of hikers to measure, for the first time ever, the toll high-altitude climbing takes on the heart, lungs, blood, and brain. "Everest, the mystery of Mallory and Irvine": The story of the early attempts on Mt. Everest and an exploration of the mystery surrounding the disappearance of George Mallory and Andrew Irvine just below the summit in 1924. "Lost on Everest": In May 1999, when Conrad Anker and his team accomplished their mission on Everest to discover the frozen body of George Mallory, legendary British mountaineer, their work had only just begun. Was there physical evidence to prove that Mallory reached the summit of Mount Everest 29 years before Edmund Hillary and Tenzing Norgay? The film reveals the clues to this mystery offered by Mallory's body, clothes and personal belongings and offers archival film footage of Mallory's expeditions.