On Thin Ice
A look at how scientists measure changes in the polar regions and what those changes mean for the animals and people who live there, as well as the rest of the planet.
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More from this season
S1 E1
To the Ends of the Earth
A survey of the Arctic and Antarctic, discovering magical new ice worlds inhabited by the most extraordinary animal survivors on Earth.
S1 E2
Spring
The sun returns after months of darkness, dynamically transforming the landscape. Millions of migrants join the hardy residents as they find mates and begin to breed.
S1 E3
Summer
Summer creates a window of opportunity that attracts hordes of visitors who cram a lifetime of drama into a few short months as they feed, fight, and rear their young.
S1 E4
Autumn
Polar landscapes are transformed as the big freeze returns. Most animals leave on epic journeys, some now battle to breed, and, for the hardy few, it’s a time of opportunity.