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Temporada 33
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.
Examining the relationship between illness and stress.
Examining the relationship between illness and stress.
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.
Poet Roger McGough explains the chemical elements.
Poet Roger McGough explains the chemical elements.
Raccoons thrive in Toronto; scientists study natural interactions dependent upon milkweed.
Raccoons thrive in Toronto; scientists study natural interactions dependent upon milkweed.
Overfishing and other man-made problems threaten the oceans.
Overfishing and other man-made problems threaten the oceans.
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.
Gisele Benoit observes moose.
Gisele Benoit observes moose.
How memory works, and the role it plays in our lives.
How memory works, and the role it plays in our lives.
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.''.
New research addresses the causes of diabetes and its treatment.
New research addresses the causes of diabetes and its treatment.
The life cycle of the baboon.
The life cycle of the baboon.
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.
Scientists study the role of hormones in disease prevention and treatment.
Scientists study the role of hormones in disease prevention and treatment.
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.
Global warming may cause rising sea levels and agricultural disaster.
Global warming may cause rising sea levels and agricultural disaster.
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