Ancient crystals reveal Earth's earliest era.
An innovative twin-satellite mission is watching water move across our blue planet.
Hot times in Earth's past lend insight to future warming.
A new hypothesis of mountain growth challenges plate tectonics.
The American Southwest's landscape—made digitally.
What could happen if global warming melts Greenland completely?
Geologists monitor the massive volcano under 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.