It's been thousands of years since an eruption occurred at Yellowstone, and new research shows what may be contributing to that.

Most tourists who visit Yellowstone National Park snap photos of Old Faithful and stroll past bubbling mud pots, never realizing they're walking on top of one of Earth's most powerful geological ...

That’s the word U.S. Geological Survey volcanic experts used to describe a muddy eruption at Black Diamond Pool in Yellowstone National Park on Saturday morning. Video shared by the USGS on social ...

Add Yahoo as a preferred source to see more of our stories on Google. Echinus Geyser, located in Yellowstone's Norris Geyser Basin, is the largest acid-water geyser in the world, with a pH of 3.3–3.6 ...