In Yellowstone National Park, two predators reign supreme: the grizzly bear and the wolf. Watch the full episode online.

Check out this footage Chris Morgan filed of the incredible landscape of the Alaska coast and the wildlife that resides there.

Using segments from NATURE's "The Wolf that Changed America" students will explore 19th century attitudes toward wolves in the western United States. (Grades 9-12)

These video segments from NATURE's "The Wolf that Changed America" explore 19th century attitudes toward wolves in the western United States.

During this video-enhanced lesson, using clips from NATURE's "Dogs that Changed the World," students will learn that all dogs came from one ancestor- the wolf. (Grades 5-8)

These clips from NATURE's "The Wolf that Changed America," are used in the lesson, to show students that all dogs came from one ancestor- the wolf.

Did you miss the premiere? Now you can watch the full episode online.

Did you watch the premiere of "The Wolf That Changed America"? Tell us what you think.

View and download the new NATURE Comic Book: "Lobo: King of the Currumpaw."

Negative attitudes toward wolves enabled a centuries-long extermination campaign that nearly wiped out the gray wolf in the continental United States by 1950.