Rumors abound as animals are leaving Yellowstone National Park en masse. Is the Yellowstone supervolcano about to erupt?

The blue water spring is about 13 feet in diameter and 1 foot below the rim, USGS said. The water in the pool was measured at ...

Yellowstone, a popular tourist destination and namesake of an equally popular TV show, was the first-ever national park in the United States. And bubbling beneath it—to this day—is one of Earth's most ...

More geological changes are occurring at Yellowstone National Park, as another hole forms in one of the park's basins.

The gases emitted from Yellowstone’s hydrothermal areas are composed mostly of water vapor, a harmless gas. However, other gases that are poisonous to people and animals when present in certain ...

Yellowstone Caldera Chronicles is a weekly column written by scientists and collaborators of the Yellowstone Volcano Observatory. This week's contribution is from Liv Wheeler, M.S. student, and ...

Yellowstone's underground plumbing is becoming more ... chamber identified several years ago — about three to nine miles deep and 2,500-cubic miles big — sits below the Yellowstone caldera.