Spend a year in the incredible wilderness of Yellowstone National Park. While the park's herds of elk and bison are weakened by winter weather, wolves grow stronger.
The survival secrets of animals living in Yellowstone Park, one of the harshest wildernesses on Earth. August is the only month when it does not snow at Yellowstone.
A year in the life of America's Yellowstone Park. As winter looms, elk move down from the mountains to find food and beavers repair dams before the big freeze.