A British expedition summited Everest in days while supplementing xenon. Is it the secret ingredient mountaineering has been ...

Four climbers went up and down Everest in under a week with the help of xenon gas—a record-breaking ascent that has ignited controversy in the mountaineering world.

History is repeating itself in the world of controversial sports records.

Some see a record-breaking ascent by British climbers who used xenon as a breakthrough, but others view it as the latest ...

KATHMANDU, Nepal—Four men left London’s Heathrow Airport for Nepal on a May afternoon. Within five days, they were atop Mount Everest, the 29,000-foot peak where an ascent typically takes ...

The next waypoint on Psyche's voyage will be a flyby of Mars in May 2026. Officials expect Psyche to keep that date, which is ...

Fries administered the xenon gas about a week and a half before departure. Whether the team’s success is attributable to xenon “is difficult to say,” Fries says.

A group of British climbers have sparked a fierce debate after they reached the summit of Mount Everest in less than a week, crediting xenon gas as their secret weapon to acclimatize much quicker ...