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

In point of fact, not very much is known about John Colter, a man who has nevertheless attained a certain legendary status among figures of the American West.

In winter, nature may offer a sense of grace and solitude unobtainable during the crowded summer camping season. But such serenity comes at a cost. Here are some survival tips.

Select an animal name to see where each animal can be found within the park.

Photographer and author Tom Murphy is a modern-day adventurer.

Wolf expert Doug Smith discusses current research at the Yellowstone Wolf Project, and how it can help change public attitudes.

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

Check out these Yellowstone photos taken by members of the NATURE Community. Is your photo in here yet?

The Yellowstone grizzly bear was removed from the Endangered Species List in 2007. Their population continues to grow, increasing by 4 to 7 percent a year, but conflicts remain.

Shane Moore has been a nature and wildlife documentary filmmaker for more than three decades. NATURE spoke with Moore about the making of "Christmas in Yellowstone."