More geological changes are occurring at Yellowstone National Park, as another hole forms in one of the park's basins.The ...

The dominant rock type in the Yellowstone region is rhyolite, and that is very rich in silica. As hot water circulates underground, it can dissolve that silica and bring it to the surface, where it is ...

Lava in Hawaii, seismic shaking in Alaska and underwater rumblings near Oregon. Scientists say it’s not the end of the world, but it’s definitely worth watching.

Massive budget cuts at the federal level have had a major, negative impact on America's national parks - here's what it means ...