Shane Moore has been documenting the natural world for nearly three decades, producing detailed studies of complex ecological problems around the world.

Before visiting Yellowstone National Park or "bear country" familiarize yourself with safety precautions in order to avoid bear encounters.

(Airs Sunday, September 13) NATURE's The Good, the Bad and the Grizzly looks at the grizzly bear's remarkable recovery and examines the controversy behind the conservation success story.

Learn more about grizzly bears with these useful web sites and books.

In this lesson, students will study the history of the grizzly bear, its decline in population, and the effort made to bring it back from near extinction.

As the grizzly bears of Yellowstone settle into their winter hibernation, the debate concerning their future will remain decidedly active.

The Endangered Species Act helped save Yellowstone's grizzly bears from extinction, but that doesn't mean the great bears are out of the woods.

Download grizzly bear wallpaper for your desktop.