"The discovery emphasizes the dynamic nature of Yellowstone's thermal activity," Yellowstone Volcano Observatory's Mike ...

Christmas came early for geologists at Yellowstone National Park this April when a regularly scheduled survey resulted in ...

Baby bison appear to have a blast chasing each other at Yellowstone National Park Lake Mead warning issued over "lethal temperatures" Take a first look at the new Harry Potter as HBO begins filming ...

After a thermal explosion at Biscuit Basin, the Yellowstone Volcano Observatory unveils a new safety plan to enhance monitoring and protect visitors in the park.

A bison in Yellowstone National Park appeared to stumble into the scalding water of Grand Prismatic Spring, causing its death as tourists looked on during the park’s busiest season.

Yellowstone Caldera Chronicles is a weekly column written by scientists and collaborators of the Yellowstone Volcano Observatory. This week's contribution is from Blaine McCleskey, research ...

If the Yellowstone supervolcano were to erupt — and there’s no indication that will happen any time soon — Billings residents could be up to their chins in ash.

Mike Poland, who leads the Yellowstone Volcano Observatory for the U.S. Geological Survey, says these discoveries are helping scientists better understand how the whole system works.

Photos show the bison struggling in the spring, thrashing and jumping into the air to try to get away from the boiling hot water.