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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
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NOVA Labs

North America Sky Tour

North America looked different in the past and will likely be different in the future. Learn why in the Sky Tour, which includes sweeping visuals from Making North America and Google Earth flyovers to bring you the story of the geological forces that shaped our continent.

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