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Learn more about why the story of how wolves saved Yellowstone National Park’s aspens is more complicated — and more instructional — than it appears.

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 ...

Visitors at Yellowstone National Park may get lucky enough to hear the howling of wolves in the distance at the park. However, those moonlight nights were once silent, after the natural population of ...

Ecosystems change when keystone species restore balance. Philanthropy can learn from nature by funding the actors, infrastructure and relationships that allow complex systems to regenerate.

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, ...