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 ...

Arsenal celebrated taking the lead against Brentford on Saturday night thanks to Kieran Tierney - but their joy was short-lived as the new semi-automated offside system finally adopted by the ...

General Atomics Reapers, which cost around $30 million apiece, can fly at altitudes over 40,000 feet (12,100 meters) and remain in the air for over 30 hours. They have been flown by both the U.S ...