Wildlife cameras positioned throughout Yellowstone National Park have captured something researchers didn't expect to see.

Thirty years ago, park rangers reintroduced grey wolves into Yellowstone National Park. They wanted to restore the ecosystem and get the elk population, which had decimated the plant community, in ...

This winter saw the most wolves from Yellowstone National Park killed in about a century. That's because states neighboring the park changed hunting rules in an effort to reduce the animals' numbers.

Claims that wolves have rescued Yellowstone National Park's aspen trees through a "trophic cascade" oversimplify a complex ...

Caught in Canada and flown to Yellowstone, 41 wolves were released in the area between 1995 and 1997, restoring the only missing member of the park's native mammals. Since then, wolves have begun ...

Visitors to Yellowstone National Park were horrified when a man recently got dangerously close to a pack of wolves. In a now-viral video shared by Keith Allen Kerbs on Oct. 6, an unidentified man ...