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In mountaineering, the death zone refers to altitudes above which the pressure of oxygen is insufficient to sustain human life for an extended time span. This point is generally agreed as 8,000 m (26,000 ft), where atmospheric pressure is less than 356 millibars (10.5 inHg; 5.16 psi). [ 1 ]
All 14 summits in the death zone above 8000 m, called eight-thousanders, are located in the Himalaya and Karakoram mountain ranges. Many deaths in high-altitude mountaineering have been caused by the effects of the death zone, either directly by loss of vital functions or indirectly through wrong decisions made under stress or physical ...
Helicopters flew up to 7,000 meters but were not able to locate the lost mountaineers. After the weather conditions worsened, the search and rescue operation was called off. Experts speculated that the three lost mountaineers would have perished by that time, as they were lost in the death zone, where the chance of survival was slim to none. [11]
The physiological-deficient zone extends from 3,600 m (12,000 ft) to about 15,000 m (50,000 ft). In this zone there is an increased risk of hypoxia, trapped-gas dysbarism (where gas trapped in the body expands), and evolved-gas dysbarism (where dissolved gases such as nitrogen may form in the tissues, i.e. decompression sickness). [3]
Several people, including examiners at the autopsy believe that both Cooper and Johnson were murdered. Johnson was buried in a cemetery for mountaineers at the trail head of Aconcagua mountain. [1] In 2020 her backpack and a 35mm camera loaded with film was found in the melting glacier; it was labeled with her name and Denver, Colorado address.
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The beginning of mountaineering as a sport in the UK is generally dated to the ascent of the Wetterhorn in 1854 by English mountaineer Sir Alfred Wills, who made mountaineering fashionable in Britain. This inaugurated what became known as the Golden Age of Alpinism, with the first mountaineering club – the Alpine Club – being founded in 1857.