The area's evolutionary roots opens this look at the African valley.
2: The Great Rift: Out of the Ashes
Oct 15, 1989
The wildlife that lives on the Great Rift's ash plains.
3: The Great Rift: Breaking the Continent
Oct 22, 1989
Examines the Red Sea, the island of Madagascar and East Africa.
4: Under the Ice
Oct 29, 1989
Soft coral, sponges, tubeworms, anemones and giant cod adapt to life in Antarctica's subzero waters.
5: Land of Dragons
Nov 12, 1989
Profiles the wildlife living within the British crown colony of Hong Kong
6: The Great Wood of Caledon
Nov 19, 1989
An exploration of the Caledonian forest in Scotland, Britain's largest remaining area of ancient woodland.
7: Gorillas
Dec 10, 1989
A portrait of the endangered mountain gorilla in equatorial Africa.
8: Forest of Fear
Dec 17, 1989
A look at the maneating tigers of the Sundarbans delta in India.
9: Gran Paradiso
Jan 7, 1990
Resource management in Italy's alpine Gran Paradiso National Park has consequences beyond the parks boundaries.
10: Cranes of the Grey Wind
Jan 21, 1990
Scientists study sandhill cranes on Nebraskan plains, Alaskan and Siberian coasts and in the Northwest Territories.
11: King Solomon's Mountains
Feb 4, 1990
The forests and waters of Ethiopia's Bale Mountains, may one day renew the country's depleted landscape.
12: Hunters of the Sky
Feb 11, 1990
A look at how Europe's birds of prey have adapted.
13: A Wolf in the Fold
Feb 18, 1990
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.
14: The Colorado
Mar 4, 1990
Tracing the course of the Colorado River.
15: The Emerald Isle
Mar 11, 1990
Thousands of years of human settlement provide the backdrop by which to discover the wildlife of Ireland.
16: Giant Otters
Mar 18, 1990
The fur trade continues to threaten the South American otter with extinction, despite its status as an endangered species.
17: The Haida Gwai: Islands of the People
Mar 25, 1990
Profiles the Haida Indians who live on British Columbia's Queen Charlotte Island.
18: Presque Isle: Land in Motion
Apr 1, 1990
An exploration of the environmental impact of man's attempts to halt the erosion of Presque Isle beaches.
19: Yellowstone on Fire
Apr 8, 1990
The effect of the 1988 fire on the ecosystem of Yellowstone National Park.
20: Serpents
Apr 15, 1990
A natural history of the snake includes its significance to man as a symbol of fertility, immortality and death.
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