The couple answer your questions about their time in the Frank Church-River of No Return Wilderness, wolf sightings, and the making of the PBS Nature film.

A romantic adventure becomes something much greater in the Frank Church-River of No Return Wilderness. Watch the full episode of the PBS Nature film, River of No Return.

Packs, howls, and bows. Facts and stats about the gray wolf: the largest member of the canine family and ancestor of the domestic dog.

What happens to nature after a nuclear accident? And how does wildlife deal with the world it inherits after human inhabitants have fled?

The two-part special "Dogs That Changed the World" tells the epic story of the wolf's evolution, how "man's best friend" changed human society and how we in turn have radically transformed dogs.

Discover the epic history of the Druids, one of more than a dozen gray wolf packs now occupying the 2.2 million acres of Yellowstone National Park.

In the vast and complex kingdom of Yellowstone, two dominant predators reign supreme: the grizzly bear and the wolf.

On a remote Arctic island, a breeding pair of gyrfalcons and a pack of Arctic wolves struggle to raise their young as nine months of snow and ice melt away.

NATURE presents a breathtaking look at wintertime deep within Yellowstone, America's first national park.