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.

The Druid wolves of Yellowstone are the most celebrated wolf pack in North America. Watch the full episode now.

Nearly a dozen years since the wolves returned to Yellowstone, the recovery of that system to its natural balance is well underway.

Award-winning wildlife cinematographer Bob Landis discusses the making of the film.

A lone black wolf covets the daughter of the powerful patriarch of the Druid wolf pack.

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.

Wildlife cinematographer Bob Landis is answering your questions about Clash: Encounters of Bears and Wolves. Submit your question now!

When a bison goes down, grizzlies vie for control of the carcass. Ravens and wolves call for reinforcements.

Snow brings elk into the valleys, and the wolves are riding high. The deeper the snow, the better the hunting.

Read the field diary of pro explorer Jim McNeill, written during the expedition on Ellesmere Island in preparation for the filming of NATURE's "White Falcon, White Wolf."