Yellowstone National Park is a place of wonder and beauty that never ceases to amaze the millions who visit each year.

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

With some luck, specialized equipment, a supervolcano and a narrow hole 30 stories deep, researchers demonstrated that earthquakes shake up more than just rocks—they also boost microbe populations ...

The story of wolves in Yellowstone National Park is one of the most successful—and scrutinized—wildlife restoration projects in history. Since their reintroduction in 1995, they have fundamentally ...

Bison, elk and other animals die in droves in Yellowstone's remote “animal boneyard.” Only a few know how to get there, ...

A brand-new discovery in a popular national park has “explosive” beginnings. Geologists in Yellowstone National Park recently discovered a new thermal pool, likely formed by a hydrothermal explosion, ...

Yellowstone’s "secret" century-old Old Faithful stamp is available only by request and may be the last of its kind. Before ...

Learn more about the rare instances when seismic and magma activity overlap in Yellowstone National Park.

A gray wolf was illegally shot and killed just north of Yellowstone National Park last month. According to wolf advocates, wildlife watchers and guides, the wolf mostly lived inside the park and was ...

Yellowstone National Park is used to rule-breakers, but usually it's the tourists pushing their luck, not one of their own employees.

Many travelers love to visit the U.S.' stunning National Parks, but what should be done if you encounter an animal in danger?

More coverage of Billings and Montana: ...