Bison in Yellowstone National Park may seem calm, but approaching them is extremely dangerous. Learn why these massive ...

Bison jams are not uncommon in Yellowstone given their population at the park has ranged from 3,500 to nearly 6,000, the National Park Service says.

At its birth in 1872, Yellowstone National Park was viewed in great part as an oversize zoo, its diverse animals managed like captives in a menagerie. But in the decades since, much has changed.

Grizzlies are starting to emerge in Yellowstone and Grand Teton national ... in the park remain the overwhelming cause of these conflicts,” according to the NPS statement. Wildlife lovers ...

It was known as the "Act to Protect the Birds and Animals in Yellowstone National Park." When Horace Albright was appointed superintendent of Yellowstone in 1919, he dedicated himself to expanding ...