An iconic apex predator appeared through thick fog like an apparition and cautiously watched a photographer in Yellowstone ...

A pack of wolves took down a bison in Yellowstone National Park and attracted a crowd of people — that the rest of the bison herd then charged into.

Amazing! When I first started visiting the park I was told that they were there but (were) like ghosts because even Rangers ...

It's not the geothermal geysers, bears, or bison, but this one safety concern in Yellowstone National Park claims more lives ...

Cougar sightings are rare in Yellowstone, with an estimated population of only 34 to 42 animals residing in the park’s vast northern range. The stealthy cats prefer rugged terrain and prey ...

Utterly heedless of our presence and, indeed, that of the Lodge, these huge animals continued on their summer stroll in timeless testament to Yellowstone National Park’s 153-history as the ...

Park City Institute will present "National Geographic Live! Wild Wolves of Yellowstone" on Friday with Explorer Doug Smith.

A new study highlights how life possibly evolved prior to and during the rise of Earth’s oxygenated atmosphere.

Creel and his colleagues have been researching wild dogs and lions in two Zambian national parks for more than a decade.

Yellowstone has established a population goal of 3,500 to 6,000 animals after calving, with an average population of around 5,000 a year. To control the number of bison, the park would continue to ...

To find out more about how to protect yourself from bears, visit NPS' Bear Safety page. For more information on how to respond to other animals in the park, visit Yellowstone's Safety page.