Inside Nature's Giants

The Giraffe's Evolution

Features

Giraffe and scientists

Monday 20 July 2009

Richard Dawkins

Evolution produces almost perfect design – the illusion of design, it looks almost exactly as if an engineer had done it...

The story about how the giraffe got its neck is a sort of classic evolutionary chestnut. Because when everyone's introduced to it the story has been the giraffe stretched its neck, up like that to get its head to the top of the trees. And that simply lengthened the neck and then the children inherited it.

That of course doesn't happen – you know – acquired characteristics are not inherited. It's done by Darwinian means. Which is that there's variation, genetic variation and those individuals that survive best are the ones who passed on the genes.

Remember that a designer, an engineer can go back to the drawing board, throw away the design and come back with something more sensible. A designer has foresight. Evolution can't go back to the drawing board, evolution has no foresight.

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Monday 20 July

9PM, Channel 4

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