Did Leonardo da Vinci's 'quick eye' help him capture Mona Lisa's fleeting smile?

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The famed Renaissance artist Leonardo da Vinci may have had the "quick eye" possessed by top tennis and baseball players, which enabled him to see and capture the enigmatic half-smile of the Mona Lisa.

Did Leonardo da Vinci's 'quick eye' help him capture Mona Lisa's fleeting smile? : Read more