Millions thrive at high altitudes due to remarkable genetic adaptations. Tibetans, for instance, possess a gene variant allowing efficient oxygen use without dangerously thick blood. Andeans and ...

People who climb too fast or too high risk acute altitude sickness, which can lead to life-threatening hypoxic brain injury. By using in vivo electrochemistry, researchers demonstrated that ...

To National Geographic Explorer Alison Criscitiello, there is nothing more thrilling than cold, high-altitude places. As a glaciologist and ice core scientist, her work has taken her from the Arctic ...

Some athletes go to the gym. Some run long distances across vast terrains. Some even build their fitness using brine and seafoam. But many Olympic hopefuls, such as those competing in this year's ...