Yellowstone Released 14 Wolves Into a Dead Valley — What They Did to the Rivers Was Unbelievable

Yellowstone’s wolf reintroduction became one of the most famous wildlife restoration stories in modern history. This video explores how bringing wolves back changed elk behavior, affected vegetation, influenced other animals, and became linked to major ecological changes across the park’s valleys and river systems. Discover how one predator helped reshape an entire ecosystem—and why Yellowstone is still one of the world’s most fascinating examples of trophic cascades and rewilding.