Mona's Formerly Inscrutable Smile

According to a computer algorithm developed by researchers at the Universities of Amsterdam and Illinois that assesses people's mood by examining facial features, the Mona Lisa was 83% happy, 9% disgusted, 6% fearful, and 2% angry. DaVinci, on the other hand, would be 100% happy knowing so many people are spending so much time worrying about it. Though of course he'd say it in code.