A British mountaineer has reached the summit of Mount Everest for the 19th time, breaking his own record for the most ascents ...

British mountaineer Kenton Cool has scaled Mount Everest for the 19th time, breaking his own record for the most climbs up ...

Rather than taking weeks or months, climbers are trying to summit Everest in just 7 days by inhaling xenon gas. NPR's Ayesha Rascoe speaks to Dr. Peter Hackett, a pioneer in altitude research.

Kenton Cool, 51, from southwest England, first climbed Mount Everest in 2004 and has been doing it almost every year since ...