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Incredible Shells

David Attenborough investigates two shells that have proved to be winners in evolution: the tortoise's shell and the shells of birds' eggs.

David Attenborough investigates two shells that have proved to be winners in evolution: the tortoise's shell and the shells of birds' eggs. The ostrich egg is so strong it is possible for a person to stand on it without it breaking, but how does the chick break out of this fortress? The evolution of the tortoise shell was for a long time a mystery and this bony box offers a lot more than just protection.

28 minutes

Credits

Role Contributor
Presenter David Attenborough
Executive Producer Stephen Dunleavy
Director Sharmila Choudhury
Producer Sharmila Choudhury
Writer Sharmila Choudhury
Producer Hilary Jeffkins
Director Hilary Jeffkins
Writer Hilary Jeffkins
Production Company Humble Bee Films

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