In 2001, satellite imagery captured a mysterious “thermal anomaly” on an unexplored volcano at the ends of the Earth. What lies inside could provide new clues to help predict volcanic…

Climbers Alex Honnold and Tommy Caldwell set out on a daring expedition to tackle Alaska’s formidable Devils Thumb. Battling harsh conditions and daunting peaks, they push their physical and mental…

Reaching 29,029 feet, Mount Everest has long captivated mountaineers of all stripes. But a peak that draws athletes and mountaineers to new heights isn’t without danger — or a dark…

Follows elite climber Alex Honnold and a world-class climbing team led by National Geographic Explorer and climber Mark Synnott on a grueling mission deep in the Amazon jungle as they…

Seventy-five years after Brad Washburn, one of the greatest aerial mountain photographers of all time, first shot Alaska’s Denali Mountain from the open door of an airplane, climbing buddies Renan…