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Episode 5: The Calling

The Calling

Season 4 Episode 5
53:05
When Whales Could Walk

When Whales Could Walk

Season 51 Episode 1
53:31
Tuberculosis: The Forgotten Plague

Tuberculosis: The Forgotten Plague

Season 6 Episode 5
26:49

Prudhoe Bay or Bust!

Season 1 Episode 8

The proposed Alaskan oil pipeline and its probable effects on the teeming life of the frozen tundra are the subjects of this segment.

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