Bears may seem like the ultimate predator, especially in Yellowstone National Park, but when they come face-to-face with ...

A herd of bison gorged on fresh green grass while roaming the town of Mammoth, Wyoming, on the northwest edge of Yellowstone National Park, on Tuesday, April 29. Video from local resident Cindy ...

For decades, biologists have known that grizzly bears climb Greater Yellowstone’s highest mountains to gorge on one of the bears’ more surprising food sources: the army cutworm moth. Now researchers ...

If you live in Yellowstone National Park, you pretty much know what you signed up for, but this woman got delightful video of ...

Busy tourist season is nearly upon Yosemite National Park and officials are warning visitors to be cautious of "one of the ...

Park rangers at Yosemite are saying to stay away from “one of the most dangerous animals” in the park. According to Yosemite National Park, when one thinks of dangerous wildlife, they ...

Park rangers at Yosemite are saying to stay away from “one of the most dangerous animals” in the park. According to Yosemite ...

A new study suggests the platypus and echidna — the only egg-laying mammals — had a water-dwelling ancestor. The finding ...

Under a swath of Kentucky hills and hollows is a limestone labyrinth that became the heartland of a national park. The surface of Mammoth Cave National Park encompasses about 80 square miles.