Over the last three decades, Yellowstone National Park has undergone an ecological cascade. As elk numbers fell, aspen and willow trees thrived. This, in turn, allowed beaver numbers to increase, ...

In the heart of Wyoming lies Yellowstone National Park, a sprawling ecosystem that has captivated millions of visitors for centuries. However, its delicate balance faced a near collapse before a ...

Wild wolves, which have disappeared from Japan, still live in Europe, but are in danger of extinction. In a movie posted in 2014 by Sustainable Human, which posts videos about living things, nature, ...