For most of human history, life unfolded quickly and ended abruptly. In the early 19th century, global life expectancy ...

After more than a century of steady progress, new research warns that the world’s life expectancy boom is slowing, largely because improvements in early-life mortality have already been achieved.

The El Niño-Southern Oscillation (ENSO), the planet's greatest driver of year-to-year climate swings, shapes temperature, ...