Overview: The area's evolutionary roots opens this look at the African valley.
Overview: The wildlife that lives on the Great Rift's ash plains.
Overview: Examines the Red Sea, the island of Madagascar and East Africa.
Overview: Soft coral, sponges, tubeworms, anemones and giant cod adapt to life in Antarctica's subzero waters.
Overview: Profiles the wildlife living within the British crown colony of Hong Kong
Overview: An exploration of the Caledonian forest in Scotland, Britain's largest remaining area of ancient woodland.
Overview: A portrait of the endangered mountain gorilla in equatorial Africa.
Overview: A look at the maneating tigers of the Sundarbans delta in India.
Overview: Resource management in Italy's alpine Gran Paradiso National Park has consequences beyond the parks boundaries.
Overview: Scientists study sandhill cranes on Nebraskan plains, Alaskan and Siberian coasts and in the Northwest Territories.
Overview: The forests and waters of Ethiopia's Bale Mountains, may one day renew the country's depleted landscape.
Overview: A look at how Europe's birds of prey have adapted.
Overview: The relationship between working sheepdogs and flocks of sheep. Selective breeding yields a sheepdog with outstanding abilities to tend the creature other canines prey upon.
Overview: Tracing the course of the Colorado River.
Overview: Thousands of years of human settlement provide the backdrop by which to discover the wildlife of Ireland.
Overview: The fur trade continues to threaten the South American otter with extinction, despite its status as an endangered species.
Overview: Profiles the Haida Indians who live on British Columbia's Queen Charlotte Island.
Overview: An exploration of the environmental impact of man's attempts to halt the erosion of Presque Isle beaches.
Overview: The effect of the 1988 fire on the ecosystem of Yellowstone National Park.
Overview: A natural history of the snake includes its significance to man as a symbol of fertility, immortality and death.