David Attenborough's Natural Curiosities is a Nature programme.  Next Show TimesSeasons in DetailYou may also like
David Attenborough's Natural Curiosities: Incredible ShellsSeries 4, episode 5Directed by (unconfirmed) Hilary Jeffkins Sir David Attenborough examines the mysteries behind some of nature's most fascinating creatures and plants. In this episode, he investigates two shells that have proved to be winners in evolution: the bird's shell and the hard shell of the tortoise. 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. Click to see when David Attenborough's Natural Curiosities, Incredible Shells is coming up on UK TV Cast (unconfirmed)
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