It didn’t take long for my body to recognize the sudden lack of oxygen, reminding me that the effects of altitude are very ...

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.

As the City of Seven Hills, Cincinnati breaks the Midwest stereotype of comprising only of flat farmland ... Turns out, the highest altitude in the city isn't in any of those neighborhoods.