Bölümleri izlendi olarak işaretlemek için oturum açman gerekiyor. Giriş yap veya kaydol.
Sezon 33
Yayınlanma tarihi
Kas 04, 1992
Alberta ranchers fear that a bison herd in Wood Buffalo National Park carries communicable diseases.
Alberta ranchers fear that a bison herd in Wood Buffalo National Park carries communicable diseases.
Yayınlanma tarihi
Kas 11, 1992
Examining the relationship between illness and stress.
Examining the relationship between illness and stress.
Yayınlanma tarihi
Kas 18, 1992
Environmentalists, the oil industry and politicians debate drilling for oil in Alaska's Arctic National Wildlife Refuge.
Environmentalists, the oil industry and politicians debate drilling for oil in Alaska's Arctic National Wildlife Refuge.
Yayınlanma tarihi
Kas 25, 1992
Poet Roger McGough explains the chemical elements.
Poet Roger McGough explains the chemical elements.
Yayınlanma tarihi
Ara 02, 1992
Raccoons thrive in Toronto; scientists study natural interactions dependent upon milkweed.
Raccoons thrive in Toronto; scientists study natural interactions dependent upon milkweed.
Yayınlanma tarihi
Ara 16, 1992
Overfishing and other man-made problems threaten the oceans.
Overfishing and other man-made problems threaten the oceans.
Yayınlanma tarihi
Ara 23, 1992
Toys play a role in childhood development and help children learn to cope with a complex world.
Toys play a role in childhood development and help children learn to cope with a complex world.
Yayınlanma tarihi
Oca 06, 1993
Gisele Benoit observes moose.
Gisele Benoit observes moose.
Yayınlanma tarihi
Oca 20, 1993
How memory works, and the role it plays in our lives.
How memory works, and the role it plays in our lives.
Yayınlanma tarihi
Oca 27, 1993
Anthropologist Dr. Shirley Strum reveals the social behavior of a troop of African olive baboons known as the ``Pumphouse Gang.''.
Anthropologist Dr. Shirley Strum reveals the social behavior of a troop of African olive baboons known as the ``Pumphouse Gang.''.
Yayınlanma tarihi
Şub 03, 1993
New research addresses the causes of diabetes and its treatment.
New research addresses the causes of diabetes and its treatment.
Yayınlanma tarihi
Şub 16, 1993
The life cycle of the baboon.
The life cycle of the baboon.
Yayınlanma tarihi
Şub 24, 1993
A natural park protecting one of the world's last remaining undamaged coral reefs is located off the coast of Egypt.
A natural park protecting one of the world's last remaining undamaged coral reefs is located off the coast of Egypt.
Yayınlanma tarihi
Mar 24, 1993
Scientists study the role of hormones in disease prevention and treatment.
Scientists study the role of hormones in disease prevention and treatment.
Yayınlanma tarihi
Mar 31, 1993
Close-up photography shows the plants and animals that inhabit the bogs of the world, including orchids, mosses and carnivorous plants.
Close-up photography shows the plants and animals that inhabit the bogs of the world, including orchids, mosses and carnivorous plants.
Yayınlanma tarihi
May 30, 1993
Global warming may cause rising sea levels and agricultural disaster.
Global warming may cause rising sea levels and agricultural disaster.
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