Perhaps the most beloved activity is the Peak Walk by Tissot. This suspension bridge connects two mountain peaks and it's the only one of its kind in the world. It's also not for the faint of heart: ...

New data identifies two key risk factors for high-altitude pulmonary edema, a leading cause of death on the mountain.

Everest would feel, physiologically, as if it were an additional 3,000 feet higher ... the oxygen deprivation a mountaineer faces at high altitude. For the most part, this relationship works ...