You hear it at the beginning of every flight: In the event of an emergency, oxygen masks will drop from the plane ceiling for ...

This week marks two years since the death and 95 years since the birth of Tom Hornbein, one of the great figures of American mountaineering. Best known for his 1963 first ascent of Everest’s West ...

His eyes darting about nervously, Ailbe, a 7-year-old dog with a shaggy coat, kept still as he patiently modeled the most recent effort by humans to help his brethren in trouble -- an oxygen mask ...