Where does the death zone start?

The summits of the world's 14 tallest mountains are all found in what is ominously known as the “death zone,” which is typically identified as 8,000 metres (26,000 feet) above sea level. At these altitudes, the oxygen levels are insufficient to sustain human life for an extended period.



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Lincoln was part of the first Australian expedition to climb Mount Everest in 1984, which successfully forged a new route. He reached the summit of the mountain on his second attempt in 2006, miraculously surviving the night at 8,700 m (28,543 ft) on descent, after his family was told he had died.

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While it is just possible for man to reach the summit of Everest without supplementary oxygen, this can only be done at the expense of extreme hyperventilation and respiratory alkalosis, and even then the arterial PO2 is less than 30 Torr.

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Although there are numerous factors that affect the price of climbing Mount Everest, the average climber can expect to pay anywhere from $30,000-$100,000 or more for a Mount Everest expedition.

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Nepali tourism official Bigyan Koirala told the news agency it's “almost impossible to rescue climbers at that altitude,” the equivalent of over 20,000 feet. At that altitude, temperatures can dip to negative 30 degrees Celsius (negative 86 degrees Fahrenheit).

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Well, when you're climbing above 8,000 meters, a lot can go wrong. Acute mountain sickness and exhaustion are believed to be the leading causes of death on the mountain.

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It takes 19 days round trip to trek to and from Everest Base Camp. Once at Everest Base Camp it then takes an average of 40 days to climb to the peak of Mt.

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