Most of my most cherished camping adventures have taken place in the high country. As soon as winter ... The wilderness at high altitude is pristine, the views unparalleled and more often than ...

The U.S. is tracking a high-altitude balloon flying over the Western part of the country, it is reported. The military has determined the balloon is not a threat but are unsure of its origin or ...

Browse a gallery of the U.S. Air Force's high-altitude balloon experiments and the researchers, scientists, and test pilots who made them possible.

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 ...