Entombed at the Ashfall Fossil Beds State Historical Park, teeth from the rhino fossils were analyzed by researchers at the ...

Scientists have found previously undocumented ash deposits buried beneath the Lava Creek Tuff in Wyoming — and at least one ...

The Yellowstone region's Beartooth Mountains feature some of the most ancient rocks in North America — as old as 3.96 billion ...

Yellowstone volcanism has produced some of the youngest rocks in North America. This same region also features some of the ...

There’s not a grizzly bear in Yellowstone National Park that is willing to mess with a bison herd on full alert. The accompanying footage, captured Monday via the park’s livestream camera ...

The eruption restarted at midday when when molten rock began pouring out of a vent in Kilauea's summit caldera, the Hawaiian Volcano Observatory said in a statement. The lava was contained within ...