In Photos: Planet Earth
Showing the most extreme places on Earth and the animals who live there. These stunning images have been taken in some of the world's most extreme environments...

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A flying shark?
A great white shark breaches while hunting seals.
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Penguins
A group of emperor penguins huddle in the Antarctic.
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Freshwater Croc
Taken from the freshwater episode, this crocodilian lies just below the surface of the water, hiding its location from the bank.
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Brown Bear and Cub
A brown bear mother leads her cub down the mountainside.
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Humpback
Humpback whales spectacularly breach out of the water, communicating with other whales in the area.
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Elephant in water
An elephant plays in water raising the question, did their trunk evolve as a snorkel?
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Fennec fox
A fennec fox stares into the camera, no doubt hearing the camera operator before seeing them.