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Natural World

Natural World

BBC Earth HD, Tor 29 aug 02:25 - 03:15

Antologi, Djur, Storbritannien

David Attenborough has a passion for birds' eggs. These remarkable structures nurture new life, protecting it from the outside world at the same time as allowing it to breathe. They are strong enough to withstand the full weight of an incubating parent and weak enough to allow a chick to break free.
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