The Planetary Health Check is a key monitor of earth's vital signs—and will guide action for a more sustainable world.

Beneath our feet lies a hidden world as mysterious as space itself, the Earth’s core. This distant interior region, more than 3,000 miles (5,000 km) beneath the surface, is out of reach of instruments ...

The Earth’s atmosphere is nothing but freely roaming molecules. Left alone, they would drift and collide, and eventually even out into a mixture that’s dynamic, yet stable and broadly unchanging. The ...

In the whole history of Earth's climate, few events are as extreme as those that geologists call "Snowball Earth." ...