Climbing Mount Everest without supplemental oxygen is one of mountaineering’s most extreme feats, demanding extraordinary endurance, skill, and mental resilience. In the thin air of the death zone, ...

Ever wondered what it feels like to ascend an 8,000-meter peak without supplemental oxygen? Mountaineer Stefi Trouget takes ...

As altitude increases and oxygen levels drop, climbers on Kilimanjaro face physiological risks that can turn a straightforward hike into a dangerous situation.

Add Yahoo as a preferred source to see more of our stories on Google. As the Sherpa team fixed the last meters of rope to the 8,849m summit of Everest today, the Khumbu Icefall and the Lhotse Face ...

Add Yahoo as a preferred source to see more of our stories on Google. Independent climbers hoping to summit Nepal's 8,000m peaks without supplementary oxygen or Sherpa support can relax. They're still ...

SAN DIEGO (FOX 5/KUSI) — Austrian-born Gerlinde Kaltenbrunner was 23 years old when she reached the summit of her first 8,000-meter peak. “Already from my childhood, it was my big passion to climb ...

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. To reach the highest point on Earth ...