The bison died in the boiling waters of the Grand Prismatic Spring. This happens from time to time, but usually not in front of a crowd.

Over the weekend, a bison stumbled into the Grand Prismatic while several visitors could do nothing to save it.

Yellowstone National Park has a new plan for dealing with geologic hazards like thermal explosions and earthquakes for the first time in 11 years ...

Some Yellowstone visitors were left reeling from witnessing a bison’s last moments after the animal fell into one of the park ...

The Earth hides powerful forces beneath its surface—and six volcanoes could unleash devastation on a global scale. From Italy ...

One hundred years ago, on June 23, 1925, a mountainside in the Gros Ventre Range in northwest Wyoming collapsed, unleashing ...

What if you only had a day or two to spend in Yellowstone National Park? Where would you go? What would you photograph? If ...

In Bolivia's remote Andes, an ancient volcano is stirring, and scientists are watching closely. Known as a Zombie Volcano, ...

The December 18 explosion is the region’s fourth in three years—and has fired out 10 times more lava per second than any of the past three at their peaks. Here's what happens next.