Over the last three decades, Yellowstone National Park has undergone an ecological cascade. As elk numbers fell, aspen and willow trees thrived. This, in turn, allowed beaver numbers to increase, ...

A look at how wolf policy shifted from eradication to protection, and why wolf conflict is rising again across the West. The ...

Thirty years ago, park rangers reintroduced grey wolves into Yellowstone National Park. They wanted to restore the ecosystem and get the elk... How the wolf changed Yellowstone 30 years after ...

A new study shows that interactions between wolves and cougars in Yellowstone National Park are driven by wolves stealing ...

These rare kills in Washington State have biologists searching for answers. “Everyone always assumes wolves have the upper ...