Deep in Alaska’s Katmai National Park, a perfectly round, 1,600-foot-wide crater has puzzled scientists for decades. Known as ...

The Savonoski Crater is a round hole in Alaska's Katmai National Park that has defied scientific explanation ever since it ...

Kilauea, one of the world’s most active volcanoes, has been erupting on and off for nearly two months since it burst to life ...

This is the 10th episode of eruptive activity from Kilauea since Dec. 23, the Hawaiian Volcano Observatory said.

Hawaii's Kilauea volcano erupted for the 10th time Wednesday evening with spectacular lava fountains, about a week after the ...

Alaska’s bears gather at the Brooks River in the Katmai National Park to feast on salmon and prepare for the long winter ...