Scientists dissect Mona Lisa's smile

Why was the Mona Lisa smiling? Because she was happy — 83 percent happy, to be exact, according to scientists from the University of Amsterdam.
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Inventor: Ultra-detailed scans reveal Mona Lisa secrets – Chico Enterprise-Record

Scientists have finally worked out whether the Mona Lisa is smiling, indy100

The type of smile according to Rubin (1974). (A) Mona Lisa smile

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The Secrets Behind Mona Lisa's Smile

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What's Behind Mona Lisa's Smile? Another Woman, monalisa

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Frontiers Looking Into Mona Lisa's Smiling Eyes: Allusion to an Illusion

Does the Mona Lisa smile?

How Leonardo da Vinci Made Mona Lisa Smile - The Atlantic