PBS Nature schedule

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The origins of the solar system and life on Earth; how life is affected by the forces of nature. Host: George Page. Narrator: James Earl Jones.

The importance of the atmosphere and the oceans both in creating and destroying life. Host: George Page. Narrator: James Earl Jones.

The influence the sun and moon have on the seasons and the tides. Host: George Page. Narrator: James Earl Jones.

The technology scientists use to probe the planet and how it improves knowledge of the forces of nature.

The 1883 eruption of Krakatau blows open a six-and-a-half mile hole and causes tsunamis killing more than 40,000 people.

The varied activity, both human and natural, that occurs on the slopes of active volcanoes.

The history of diamonds, from their beginnings in the earth's core to mining and acquisition.

Wolfgang Bayer captures the winter solitude of Yellowstone National Park.

Footage of the 1988 Yellowstone blaze and its aftermath shows possible causes and results of the fire.

Global changes affect the wilderness of the Yosemite Valley in the Sierra Nevada mountains of Northern California.

An evocative exploration of a wild and little-known landscape in the heartland of North America; featuring new animal behavior, the film pairs blue-chip wildlife sequences with human characters working together to save remaining wild grasslands.

Eagles, pumas, sandhill cranes and other creatures seek sustenance from the Colorado River and its environs.

How wildlife and animal life survive in a severe landscape with temperatures well above 115 degrees.

Undisturbed the saguaro cactus can grow to 60 feet, weigh 10 tons and live 150 years.

The Druids are the first wolves reintroduced into Yellowstone National Park.

See how a man's mission to kill a wolf had a lasting impact on wilderness preservation.

Each time the grizzly and the wolf meet in Yellowstone National Park, one of them has a tactical advantage.

Grizzly bears cause social and environmental problems at Yellowstone National Park.

Rangers at Denali National Park in Alaska train hikers for planned encounters with grizzlies; bears fish for salmon.

Grizzlies, wolves and cougars roam Montana's rugged, pristine Glacier National Park.

Former Vietnam medic Doug Peacock lives as a fire watcher and conservationist in Montana's Glacier National Park.

Some 1,700 brown bears take up residence in the Tongass National Forest in southeastern Alaska.

Bear biologist Chris Morgan tracks grizzlies in the Alaskan wilderness.

Chris Morgan studies black bears caught between urban development in Anchorage, Alaska, and the wilderness.

As winter approaches, polar bears wait to hunt on sea ice in Kaktovik, Alaska; in late spring, grizzlies await caribou on the northern slope of Alaska's Brooks Range.

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