Radiation exposure is especially dangerous for flight crews and frequent flyers. Here's how to best protect yourself.

A new study finds that in low-oxygen environments, red blood cells absorb more glucose and convert it into a molecule that ...

If you've been to Denver and thought that the food you cooked didn't taste quite the same (usually worse), there's an actual ...

At last, you’ve arrived in Cuzco, Peru — you’re ready for your dream trek to Machu Picchu. There’s just one problem: You can barely catch your breath, your stomach is churning and, in the morning, ...

Once she got there she met another traveler who had reached the same conclusion, only she was there to celebrate her 90 th birthday (and 70 th wedding anniversary). “Your knees have expiration dates,” ...

The term “high-altitude illness” is used to describe the cerebral and pulmonary syndromes that can develop in unacclimatized persons shortly after ascent to high altitude. Acute mountain sickness and ...