The Worst Episodes of A Year on Planet Earth

See the incredible strategies animals like red squirrels, pikas and penguins use to cope with their changing worlds, as we journey through the seasons, in our orbit around the sun.

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Autumn signals change. For many, change brings opportunity, but also huge challenges. For some, like Monarch butterflies, it offers a chance to begin again or take a new path.

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As the North starts to face the sun, the great melt begins, and there's a baby boom. But for penguins and foxes in the South, conditions are getting harsher.

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These are the stories of the scientists and conservationists who have have used pioneering techniques to uncover new behaviour, enabling us to film this extraordinary series.

Director: Sebastian Illis

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Summer can be extreme. In The Rockies, summers are short. Pika must harvest flowers to eat before the snow returns. For Marion Island’s king penguin chicks, life has frozen still.

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Stephen Fry explores how nearly all life on Earth is impacted by our annual journey around the sun. Northern winters bring notably harsh conditions for polar bears, for example.

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