Recent scientific breakthroughs have revealed a fundamental limit to human endurance, a metabolic ceiling that caps sustained ...

Ultra-endurance athletes can push their bodies to extraordinary extremes, but even they run into a hard biological wall.

Is there a limit to the number of calories you can burn? What about when you’re doing endurance exercise like a triathlon?

On January 14, 2004, the United States announced a new "Vision for Space Exploration," promising that humans would not only visit space but live there. Two decades later, NASA's Artemis program is ...