Yellowstone National Park, famed for its geysers and hot springs, sits atop one of the world's largest active supervolcanoes.
BILLINGS, Mont. (AP) — A surprise eruption of steam in a Yellowstone National Park geyser basin that sent people scrambling for safety as basketball-sized rocks flew overhead has highlighted a ...
The ground beneath Yellowstone National Park hides one of the world’s most powerful geological threats: a supervolcano ...