The Reptiles
The program explores what the future holds for these living dinosaurs.
The program explores what the future holds for these living dinosaurs.
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Ecologist Chris Morgan explores the world of black bears.
Ecologist Chris Morgan camps among the largest concentration of grizzles in the world.
Explore the delicate balance of the interconnected lives of bears, trees, and salmon.
Doug Peacock, wildlife and his conservation crusade.
Wrangell-Saint Elias National Park and Preserve.
Bears and other animals in Alaska.
Grizzly bears cause social and environmental problems at Yellowstone National Park.
The grizzly and the wolf meet in Yellowstone National Park.
How a man's mission to kill a wolf had a lasting impact on wilderness preservation.
Two packs of wolves vie in northeast Yellowstone.
Undisturbed the saguaro cactus can grow to 60 feet, weigh 10 tons and live 150 years.
How wildlife and animal life survive in a severe landscape with temperatures well above 115 degrees.
Nine chapters in the history of the Colorado River.
An evocative exploration of a wild and little-known landscape in the heartland of North America.
More than just an awe-inspiring valley, Yosemite is a place where history was made.
Yellowstone Park is seen before and after the 1988 fire.
Winter is a time of scarce resources for wildlife of the park.
Fashion editors, jewelers and celebrities discuss diamonds.
Discover the varied activity, both human and natural, that occurs on the slopes of active volcanoes.
The 1883 eruption of volcano Krakatoa.
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