Mature elk can run 40 mph when they become so inspired, and recent footage from Yellowstone National Park shows that young elk are likewise fleet of foot when their lives are at stake. The ...

Mature elk can run 40 mph when they become so inspired, and recent footage from Yellowstone National Park shows that young elk are likewise fleet of foot when their lives are at stake. The ...

A baby elk outran — and outswam — a wolf pack in Yellowstone National Park, video shows. Screenshot of montanawild_'s Instagram video A “brave” little elk calf sprinted to safety — with a pack of ...

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 ...

On four separate occasions, Wolf 907F seized power as the alpha female leader of the Junction Butte Pack in Yellowstone National Park. (National Park Service file photo courtesy of Jeremy ...

Scientific research has long assumed gray wolves are non-migratory during springtime, staying anchored to tend to litters of nearly helpless pups. For the first weeks of life, after all, pups are ...

Aspen trees are making a comeback at Yellowstone National Park. NPS / Diane Renkin Aspen trees are getting a boost from wolves at Yellowstone National Park, new research suggests. For the first time ...