Season 20 (1981)

Tracking Army Bobcats
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September 13, 1981 • 24m

This research project by the U.S. Army is centered around Fort Carson, Colorado. Bobcats are captured through the use of dogs and ...Read more

The Changing World of the Oxbows
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October 4, 1981 • 24m

Setting takes place in the African country of Zambia and shows how Oxbow Lagoons are formed by the meanderings of the Luangwa Rive...Read more

Cougar Family
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October 18, 1981 • 24m

This episode will film the adventures of puma kittens from their birth in the Uinta Mountains of Utah until they are weaned from their mother.

Valley of the Beavers - Part 1
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November 8, 1981 • 24m

In "Valley of the Beavers, Part I," the journey begins in the mesmerizing landscapes of North America, where the intricate lives o...Read more

Valley of the Beavers - Part 2
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November 15, 1981 • 24m

In "Valley of the Beavers, Part II," the journey continues in the mesmerizing landscapes of North America, where the intricate liv...Read more

Operation Genesis - Part 1
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December 27, 1981 • 24m

When the Guri Dam was built on the Caroni River in the wilderness of eastern Venezuela, it created a huge lake that flooded 500 sq...Read more

Operation Genesis - Part 2
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January 3, 1982 • 24m

The conclusion of Operation Genesis. When the Guri Dam was built on the Caroni River in the wilderness of eastern Venezuela, it cr...Read more

Lemurs of Madagascar
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January 31, 1982 • 24m

The lemurs evolved in many forms and colors in the antiquity of time and then stopped, but they still prevail. Madagascar has been...Read more

Hammerhead Sharks of the Sea of Cortez
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February 14, 1982 • 24m

Baja, California is the setting for study of the Hammerhead Sharks and other marine life including a 20-foot whale shark. An under...Read more

The Unexplored Gran Chaco
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March 14, 1982 • 24m

Marlin observes a project that identifies and inventories animals in Gran Chaco National Park in Paraguay.

White Ghosts of the Forest
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March 21, 1982 • 24m

Marlin visits the primitive white lemur that live in Madagascar.