This week marks two years since the death and 95 years since the birth of Tom Hornbein, one of the great figures of American mountaineering. Best known for his 1963 first ascent of Everest’s West ...
If you've ever traveled on an airplane, you know that masks can drop down to supply oxygen in the case of an emergency. Airline oxygen masks have about a 15-minute supply and typically fall when an ...
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