Planet Earth: The Blue Planet

This definitive natural history of the world's oceans covers everything from popular shores and teeming shallows to the mysterious open depths.

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The Blue Planet

The oceans are an integral part of our lives. The ocean is governed by a complex system of biological and physical forces. This first episode demonstrates the sheer scale, power and complexity of the "Blue Planet."

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The Deep

A place of mountain ranges, perpetual night, and the weirdest life forms on our planet. A true voyage into the unknown with constant surprises in store. On the floor of the ocean deep, all manner of primitive creatures crawl across the ooze.

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Open Ocean

A void. Endless blue stretches in every direction. The sea bed is a staggering eight kilometres deeper down and the nearest island is 500 kilometres away. There is nothing save the burning sun above and the blackened abyss below.

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Frozen Seas

Life on the edge of a frozen sea is tough. Pack-ice at both poles is constantly on the move, and in winter freezes with temperatures 70 celsius below freezing. Only in spring, with the retreating ice and light reaching water, does life begin again.

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Seasonal Seas

Shafts of sunlight radiate through a green sea. This blazing light is the vital source of energy used by the countless billions of plankton which grow every spring and summer in the world's temperate sea, the richest of all habitats.

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Coral Seas

Bathed in warm, clear tropical water and brilliant sunlight, coral reefs are the rainforests of the sea. Surrounded by ocean deserts they are rich oases of life. Spectacular numbers make it necessary to stand out to survive.

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Tidal Seas

Tides govern marine life. Tidal marshes are one of the most productive parts of the world. Numerous plants support numerous animals, yet life is not easy.

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The boundary between land and sea is an exciting place, with animals constantly coming and going. From the open oceans, millions of seabirds are forced to come onto land to breed.