The hippocampi in the brains of London taxi drivers enlarge as a result of having to memorise the city鈥檚 extensive street map. Actors are always memorising new lines and opera singers often have to learn words and music. What effect does this have on their brains?
Graham Thomas, St Albans, Hertfordshire, UK
This article appeared in print under the headline 鈥淏rain gain鈥�
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