Its metropolitan area has grown more than 300 percent in recent decades.

As the suburbs flourish, animals struggle to survive.

After a seven-year trip, the Cassini spacecraft arrived at Saturn in July 2004.

How the North Atlantic Oscillation kicks up a commotion in the Northern Hemisphere.

How satellite data helps scientists map changes in one of Earth's great wildernesses.

To what lengths do scientists have to go to snare a gravitational wave?

One of the most abundant forms of ocean life is gelatinous goo.

Learn how communities in Thailand restored mangrove forests for the benefit of all.

Water once flowed on Mars—perhaps enough to harbor life.

Oxygen is the key to Earth's biodiversity. But it wasn't always so.