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Page last updated at 08:48 GMT, Wednesday, 23 September 2009 09:48 UK

Cooking 'changed human evolution'

Cooking caused the extraordinary transformation of our ancestors from apelike beings rather than, as previously assumed, meat eating, a new book argues. Richard Wrangham, professor of biological anthropology at Harvard University, examines whether eating cooked food allowed the human brain to grow and helped structure human society.

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