Geologists watch over the massive volcano beneath Yellowstone National Park.

How tsunami researchers are trying to get ahead of the next big wave.

Glaciologists are racing to core the largest tropical ice cap before it melts.

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

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

New insights into a rare, destructive wind storm.

Scientists are studying earthquakes from far above the tremors.

The Arctic National Wildlife Refuge is rich in oil. What’s at stake?