A friend shared this video with us. It tells an amazing story about how when a few wolves were reintroduced into Yellowstone National Park in 1995, helped to change not just the eco system but also the physical geography. It presents a moment of hope in the amazing power of nature. Plus I was particularly interested in what my forefathers did!
It began by the wolves killing some over-populated deer in the park which eventually changed the behaviour of the river in Yellowstone National Park.