The Milky Way and Andromeda Galaxy are on a collision course.
Lessons from a pioneering marine park may help restore ocean ecosystems.
Most asteroids and comets don't pass anywhere near Earth. Most.
Glaciologists are racing to core the largest tropical ice cap before it melts.
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.
Have you heard of the North Atlantic Oscillation?
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.
Watch roads and parking lots multiply around the threatened Chesapeake Bay.
Will Vietnam's biodiversity vanish faster than biologists can document it?
New insights into a rare, destructive wind storm.
Two technologies to find and describe faraway planets.
Scientists are studying earthquakes from far above the tremors.
The Universe's oldest light is cosmologists' window to the past.
The Arctic National Wildlife Refuge is rich in oil. What’s at stake?
Earth is increasingly vulnerable to the power of solar storms.
How gear and greed emptied Georges Bank.
On January 8, 2001, a healthy baby gaur was born. In Iowa. To a cow.