914 / Mona Lisa: It’s a Duchenne smile!
One bizarre remark on Mona Lisa’s smile is that she doesn’t smile at all; it’s a visual illusion. And wasn’t Leonardo da Vinci a master in optics? Turns out, half of the claim is true — literally! Neurologists Lucia Ricciardi and Matteo Bolognay have interpreted Mona Lisa’s smile as asymmetric and so non-genuine because happiness…