The condors appeared at 5,000 meters. They were not real. I got altitude psychosis a few hundred meters from high camp as I scaled the frigid face of Huayna Potosí, one of the highest mountains ...

But are you ready to battle altitude sickness, a sneaky foe that can transform a dream journey into a nightmare? According to the International Society for Mountain Medicine, approximately 25% of ...

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 ...