Yellowstone National Park's restless ground has captured attention once more, as subtle shifts beneath its steaming landscapes signal the planet's inner workings. After years of stability, a zone ...

Scientists are monitoring a city of Chicago-sized swath of rising ground at the northern volcanic rim of the Yellowstone ...

Yellowstone is a dynamic geologic system—the one constant is change. This is demonstrated daily by hydrothermal activity ...

Grand Geyser, located in Yellowstone’s Upper Geyser Basin, is the tallest predictable geyser in the world. It erupts in breathtaking displays that can reach up to 200 feet high, lasting anywhere from ...

Add Yahoo as a preferred source to see more of our stories on Google. This is a photograph of Twin Buttes in Lower Geyser Basin looking to the northwest, with Excelsior Geyser of Midway Geyser Basin ...

YELLOWSTONE NATIONAL PARK, Wyo. (AP) - Steamboat geyser erupted for the fourth time in just over a year on Sunday, prompting new questions about increased activity for the world's biggest geyser.

WEST YELLOWSTONE - One of Yellowstone National Park’s largest geysers shot to life early Monday morning, an eruption that would have occurred in the dark if not for a full moon. A park webcam captured ...

Tourists traveling by plane over Yellowstone National Park on Thursday were treated to a rare and magnificent view of the world’s tallest active geyser shooting steam 400-plus feet skyward.