It's dim up North, so people need bigger brains

LONDON (Reuters) - People from northern parts of the world have evolved bigger brains and larger eyes to help them to cope with long, dark winters and dim skies, scientists said on Wednesday.

Source: http://feeds.reuters.com/~r/reuters/scienceNews/~3/L_aepJ5bcLk/us-brains-north-idUSTRE76Q1HD20110727

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