Recent scientific breakthroughs have revealed a fundamental limit to human endurance, a metabolic ceiling that caps sustained calorie burning during prolonged physical activity. This limit, which is ...

Human life expectancy dramatically increased last century. Compared to babies born in 1900, those born at the turn of the 21st century could live, on average, three decades longer—with many living to ...

Announcement from Climate Editor Zachary Goldfarb, Foreign Editor Douglas Jehl, Deputy Director of Photography Sandra Stevenson, Data Reporting Director Meghan Hoyer, Creative Director Greg Manifold ...