下载 "Yellowstone - The Wolves are Back | Wildlife Documentary"

In 1926 the last wolf was killed in Yellowstone National Park. For 70 years the top predator was missing and elk, its prey, increased dramatically to over 20,000, turning vast areas of Yellowstone into an ecological disaster zone, browsing down the woody vegetation to almost nothing. In 1995 wolves were reintroduced. Now, 20 years later, the eco-system of the park has turned back into balance. Leopardess - Sudden Death: https://www.youtube.com/watch?v=E2ouLTzrSOY -- Welcome to the official Get.factual youtube channel! 🌍 We are a documentary streaming channel covering history, science, technology, and nature. Explore worlds distant, forgotten, and unknown; from the depths of ocean trenches to the far reaches of the cosmos. New uploads of full-length documentaries and docu-series every week! Subscribe here: https://www.youtube.com/channel/UCvD34fvRZ3QHWSkU1aUM99w?sub_confirmation=1