A gigantic bulge in the north rim of the Yellowstone caldera is the latest sign of volcanic activity in the national park.

Yellowstone is a dynamic geologic system—the one constant is change. This is demonstrated daily by hydrothermal activity ...

Experts have dismissed the possibility of an eruption, saying, 'It’s Yellowstone being Yellowstone.' ...

If you don't get to see it, there are more than 500 active geysers located within Yellowstone National Park, including Old Faithful. Established in 1872, Yellowstone National Park was the world's ...

The Yellowstone National Park experiences the most significant changes that do not signal with noise. The surface started to ...

A surprise eruption that shot steam, water and dark-colored rock and dirt dozens of feet into the sky Tuesday sent people running for safety in Yellowstone National Park. The hydrothermal explosion ...

Scientists are monitoring a city of Chicago-sized swath of rising ground at the northern volcanic rim of the Yellowstone ...

A 17-year-old tourist visiting Lone Star Geyser in Yellowstone National Park suffered significant burns to his foot and ankle after breaking through the crust of the thermal pool. This marks the first ...

For years, public imagination has fixated on Yellowstone as the ultimate natural doomsday machine, a supervolcano waiting to ...

On Monday morning, a 17-year-old male suffered what Yellowstone National Park officials say are “significant thermal burns” to his foot and ankle area in the vicinity of Lone Star Geyser near Old ...

Get any of our free daily email newsletters — news headlines, opinion, e-edition, obituaries and more. A 17-year-old male suffered what Yellowstone National Park officials say are “significant thermal ...