Climbers using xenon gas reached the summit of Everest in under five days but critics say the shortcut could lead to dangerous overcrowding and undermine the spirit of mountaineering.

Traveling at high altitude can be hazardous. The information provided here is designed for educational use only and is not a substitute for specific training or experience. Princeton University and ...

If you're traveling for a high-altitude hike, here's how to prepare for altitude sickness before you set out on your adventure.