Steamboat Geyser’s quiet adds mystery, not alarm, and gives Yellowstone visitors new ways to notice a restless landscape each ...

Every thermal feature in Yellowstone has a natural system of subterranean "plumbing" that feeds water and steam to the ...

The ground beneath Yellowstone National Park hides one of the world’s most powerful geological threats: a supervolcano capable of reshaping the continent. While the park’s geysers and hot springs ...

POZZUOLI, Italy — In Greek and Roman mythology, the Campi Flegrei volcano is depicted as the opening to the underworld. Its prehistoric eruptions blocked out the sun, turning summer into winter and ...

A new thermal vent spewing steam in the air at Yellowstone National Park is gaining attention, mainly because it's visible from a road rather than any significant change in the park famous for its ...

The volcano near Naples is shaking the ground in a way that scientists say it hasn't for centuries, posing risks for hundreds of thousands of... Italy's Campi Flegrei supervolcano is stirring. Could ...