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Avsnitt 1, Säsong 1
The polar regions, North and South, are magical ice worlds inhabited by some of the most bizarre and hardy creatures on earth.
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Avsnitt 2, Säsong 1
Polar spring triggers huge changes; Adelie penguins pilfer from each other to build nests; elephant seals fight for mates.
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Avsnitt 4, Säsong 1
In polar summer, the sun never sets; polar bear cubs' swimming lessons; spa treatments for beluga whales; male musk oxen battle each other.
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Avsnitt 5, Säsong 1
Polar winter brings the greatest test of survival; polar bear cubs are born tiny and blind; wolverines scavenge in deep snow; brinicles turn deadly when they reach the ocean floor.
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Avsnitt 7, Säsong 1
Walrus and seabird egg hunting in Siberia; in Antarctica, scientists study the world's southernmost active volcano.
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Avsnitt 8, Säsong 1
Naturalist David Attenborough offers a view of what rising temperatures will mean for the people and wildlife of the North and South poles.
9. Avsnitt 9
Avsnitt 9, Säsong 1
Autumn in Antarctica brings upheavel, dramatic battles and epic journeys as the Arctic Ocean freezes and advances at the rate of 2.5 miles per day.
10. Avsnitt 10
Avsnitt 10, Säsong 1
The wonders and riches of the polar regions have drawn people for thousands of years, yet, survival there relies on a combination of ancient wisdom and cutting edge science.
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