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#11
August 15th 05, 02:42 PM
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Tlme of useful
consciousness Altitude (ft) without oxygen 40,000 15 seconds 35.000 20 seconds 30,000 30 seconds 28,000 1 minute How, then, can someone like Ed Viesturs repeatedly climb the tallest mountain peaks in the world without supplemental oxygen? Is it because of the slower ascent and the time spent acclimating to the higher altitudes? John K. 
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