Inside Nature's

This award-winning wildlife series gives insight into
the evolution of the world’s largest animals, revealing how their bodies work from the inside out, and demonstrating how the magnificent creatures have adapted to their surroundings over thousands of years. A team of experts examine the anatomy of dangerous predators, unique herbivorous, and sea monsters like a 55 tonne sperm whale measuring over 19 metres long.
next episode20:00, Fri Nov 30
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Sperm whales have between 20-26 teeth in each narrow lower jaw that do not erupt from the gums until puberty. These teeth weigh about 900 g each. The teeth in the upper jaw usually don’t erupt from the gum line at all. Sperm whales appear to swallow their prey whole, so the teeth are not necessary for feeding. In fact some healthy sperm whales that have been caught have no teeth at all.


The sperm whale swims leisurely at the surface at 5-15 kph. But they can sustain a faster pace, when fleeing danger, of 34-43 kph for up to an hour. To assist with swimming sperm whales have a paddle shaped fins, 1.5 m long and 1 m wide, used for steering in the water and large flukes to propel themselves forward.

intestinal system

Sperm whales eat thousands of kilos of fish and squid — about 1 ton per day. It is possible thanks to unique structure of the internal organs. Stomach of whale can hold up to 500 liters of liquid and intestine reaches a length of 160 meters!

  • Episode

    White Shark

    In episode "The Great White Shark". Experts travels to South Africa to dissect a 900kg great white shark that was caught in a beach protection net.

  • Episode


    In episode "The Monster Python". How did snakes native to South East Asia end up thriving in the American Everglades? The team of experts dissects two pythons in their search for the answer.

  • Episode

    Giant Squid

    In episode "The Giant Squid". The giant squid, which was once the story of legends before its existence was officially recorded in the 19th century, is the subject of this episode’s dissection.

  • Episode

    Lion and Tiger

    In episode "The Big Cats". Experts dissects a lion and a tiger to investigate how similar these mighty felines are beneath the skin.

  • Episode

    Polar Bear

    In episode "The Polar Bear". Join Inuit hunters, scientists and the dissection team as they peer inside the body of the iconic polar bear. Can this beast adapt fast enough to thrive in a rapidly changing environment?

  • Episode


    In episode "The Camel".The team uncover the secret of the camel’s hump and investigate how its elastic legs and stretchy lips enable the camel to thrive in such a dry and hostile environment.

  • Episode


    In episode "The Dinosaur Bird". The cassowary is a gigantic bird with a fearsome reputation found in Australia’s rainforests. Through dissection, the team investigates the mystery of how it produces its deep resonant mating call.

  • Episode

    Sea Turtle

    In episode "The Leatherback Turtle". How does the leatherback turtle digest deadly jellyfish and what can be found inside its head? Take a look with the team as they dissect this extraordinary animal.

  • Episode


    In episode "The Racehorse". The racehorse is capable of incredible speed and stamina. See how their anatomy makes them some of the greatest athletes on the planet in this episode’s dissection.

  • Episode


    In episode "Rouge Baboon". In South Africa, the team of experts dissect a huge male baboon, and see how remarkably similar the anatomies of humans and baboons really are.

  • Episode


    In episode "The Hippo". This episode’s grisly dissection sees the team delve into the intestines and stomach of a Zambian hippo to find out just how much of a gluttonous feeding machine it is.

  • Episode

    Red Kangaroo

    In episode "The Kangaroo". Experts head to Australia to dissect the country’s most iconic animal – the kangaroo – and uncover some fascinating facts about their reproductive organs.

  • Episode

    Borneo Jungle

    In episode "The Jungle". Join the team of experts as they take on the hardest challenge so far – the dissection of a jungle’s ecosystem. See how waterfalls flow uphill and how parasites hold the key to keeping the jungle in balance.

  • Episode

    Sperm Whale

    In episode "The Sperm Whale". Diggers, trucks and a reluctant local tree
    surgeon join the team to dissect the body of one of the planet’s most
    phenomenal creatures: the sperm whale.

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17:20, Sun, december 8