Mallory and Irvine Research Expedition
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The goal of the Mallory and Irvine Research Expedition of 1999 was to discover whether George Mallory had summited Mt. Everest in the ill-fated attempt he made with Andrew Irvine in 1924. A group of climbers from the U.S., Great Britain, and Germany, set off towards the summit in hope of finding Mallory's camera, which would have had a picture of the summit (if they had in fact summitted). On the North Face, at 8,155 m, the expedition found Mallory's body perfectly preserved. Closer investigation proved that he had been a victim of a tragic fall in which he slipped, tried to correct himself, but did not survive.
During a second expedition in 2001, the team abandoned their search to rescue another climbing party stranded on the mountain and in deep distress. Two of the climbers were suffering from cerebral edema, a condition where the victim can hallucinate, lose balance and eventually the ability to even walk, due to lack of oxygen (which high up on Everest is only one-third that at sea level) in the brain. This condition has led to many deaths and injuries in mountaineering.