Endeavour: Everest - 2. Without Oxygen

Everest - 1. By Canoe: Everest - 3. By Balloon: In 1978, Italian and Austrian mountaineers Reinhold Messner and Peter Habeler made mountaineering history, becoming the first climbers to reach the summit of Mount Everest without the use of additional oxygen. Known as the death zone, above 8,000 metres in the Himalayas there is only a fraction of the oxygen at sea-level. Climbers suffer sickness and headaches and risk life-threatening oedemas. As they s