(CNN) -- Scientists analyzed the portrait of the Mona Lisa, a woman with famously mixed emotions, hoping to unlock her smile. They applied emotion recognition software that measures a person's mood by examining features such as the curve of the lips and the crinkles around the eyes.

The findings? Mona Lisa was 83 percent happy, 9 percent disgusted, 6 percent fearful, and 2 percent angry, according to the British weekly "New Scientist."