A hiking guide who leads excursions in Yellowstone National Park paused for a photo opportunity recently and later asked his ...

This aerial photo released by the National Park Service shows the damaged Biscuit Basin boardwalks after a hydrothermal ...

Some of the largest volcanic eruptions on the planet have occurred at Yellowstone National Park, and scientists have ...

The suit concerns brucellosis, a bacterial disease that infects cattle, swine, goats, sheep and dogs and can spread to humans ...

New mapping of the magma lying beneath Yellowstone National Park sheds light on where volcanic activity is shifting, and the ...

The giant supervolcano that lies under Yellowstone National Park is cooling off in the west but staying hot in the northeast.

A team of geologists at the US Geological Survey, working with a trio of colleagues from Oregon State University, and another ...

One of Yellowstone National Park’s most famous gray wolves, an 11-year-old matriarch who was blind in one eye, has died after ...

While millions around the world tuned in to watch Kevin Costner’s sensationalized depiction of western history in the ...

Department of Livestock and FWP join Gov. Gianforte in suing the park over its plan to increase the park’s bison population ...

The National Park Service’s plan to increase bison herd sizes has drawn criticism from state officials concerned about disease transmission.

Excelsior Geyser is located in Midway Geyser Basin, adjacent to the spectacular Grand Prismatic Spring. The geyser may have ...