Doctor's diary - The Telegraph 25th August 2008

James Le Fanu on the latest health stories hitting the headlines Life is, for the most part, ambidextrous, with the exception of us humans, 90 per cent of whom are right-handed. This goes back to that extraordinary moment a million-plus years ago when the brains of our ancestors not only tripled in size, but the functions of the two cerebral hemispheres became specialised. The left was given over to the novel faculty of language; the right to manual dexterity.

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