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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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Explore

Watch 'Explore' -- 'Pearls of the Planet: The Arctic'

High definition remote-operated cameras open a window to the wild in "Pearls of the Planet." This episode features polar bears on the Hudson Bay, beluga whales and other arctic wildlife, plus a look at the people working behind the scenes to deliver these incredible live portals into the world's natural cathedrals.

See Related: 'Pearls of the Planet: The Arctic' Reveals Life in Frozen North