The last wolves in Yellowstone Nation Park were killed nearly a century ago. But with the support of the American public in 1995 and 1996, a new chapter in Yellowstone’s history began, with a homecoming that changed the Park.

The reintroduction of gray wolves to our first national park has been described as a near-miracle, having occurred at one of those rare moments when stars align in the political sky. A wildlife conservation effort with such positive environmental impact (and ongoing controversy) will likely go unmatched for a long time.

The following video gives an account of the remarkable effect of wolf reintroduction on Yellowstone’s wild landscape.

Learn more about the “wolf effect” in Yellowstone and the ongoing scientific debate inspired by the video.