Daredevils who get high on life.
At 29,029 feet above sea level, the top of Mt. Everest isn’t an easy place to hang out. Even with the best equipment, people don’t stay up there for more than a few minutes. That’s not enough of a challenge for some people, so summiting the world’s biggest peaks without oxygen is actually a thing. At the top, your body is getting roughly the amount of oxygen in three breaths that you would get in one breath at sea level. As if that’s not challenging enough, you’re going uphill through snow. As one person who accomplished the feat explained, while approaching the top he had to breathe 18 times per step.
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