Workers at Mount Washington Observatory got an incredible view of the northern lights late Monday night. Skies were clear ...

Climbers are split over a British team’s use of xenon gas to climb Mount Everest in just four days. One Wyoming Everest ...

The team first reached the top of Mount Vinson, the continent’s tallest mountain, but was thwarted in its attempt to summit Tyree and ski down. Photograph by Jimmy Chin “A lot of things I’ve ...