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 ...

The view outside from this eco-hotel in northern Ecuador reveals vast hillsides still scarred by fires. In late January 2024, ...

The first prototype of India’s light tank is “heading to Chennai for modifications” after completing high-altitude trials in the country’s northern borders, according to Chief of the Army Staff Gen ...