Scientists are tracking changes at the giant supervolcano that lies under Yellowstone National Park, but they say there's no need to worry at the moment. “The western part of the Yellowstone ...

In 1872, when Congress established the world’s first national park near the headwaters of the Yellowstone River ... boiling mud pots and steaming fumaroles. Scenery––and the anticipated ...

Yellowstone's hot spring actually sits on top of a supervolcano. It's had 3 huge eruptions since its formation, the first of which occurred 2.1 million years ago Fumaroles (pronounced fyoo-mah ...

Besides geysers, the park has fumaroles and mud pots, as well as many multicolored hot springs like Mammoth Hot Springs. Yellowstone’s ecosystem is a sanctuary for a diverse array of wildlife.