"Yellowstone is no ordinary wilderness, it is the world's first national park, a lost world of vast plains and endless forests defended on all sides by towering mountains, home to America's last great bison herds, the grizzly bear and realm of the wolf...Join the charismatic cast of Yellowstone's wildlife as they turn to face the extreme challenges of the seasons...The daily struggles of the wildlife are intimately linked to Yellowstone's greatest secret: that sleeping right beneath the snow is probably the world's largest volcano. The fate of everything in this extraordinary wilderness is in the hands of forces more powerful than we can possibly imagine." -- Container.