A rewilding triumph: wolves help to reverse Yellowstone degradation

Twenty-five years ago, the national park attempted to reintroduce wolves - now scientists are celebrating it as one of the greatest rewilding stories ever

Twenty-five years ago this month, wolves were reintroduced to Yellowstone, America's first national park and an ecosystem dangerously out of whack owing to the extirpation of its top predator.

This monumental undertaking marked the first deliberate attempt to return a top-level carnivore to a large ecosystem. Now scientists are celebrating the gray wolves' successful return from the brink of extinction as one of the greatest rewilding stories the world has ever seen.