Smoke billows from the mouth of Mt. Shasta like a thunderous cough. Within moments, clear skies turn gray, and the sun vanishes behind thick, shifting layers of volcanic gas and ash. Visitors snap ...

WASHINGTON — Government scientists have classified 18 U.S. volcanoes as “very high threat” because of what’s been happening inside them and how close they are to people. The U.S. Geological Survey has ...

If you like the phrase "apocalyptic beauty," you may consider a trip to the Salton Sea. In this remote corner of Southern California, treeless mountains are reflected in the sea's glassy waters. A ...