25 Secrets of Mona Lisa Revealed

By Jeanna Bryner, LiveScience Staff Writer

posted: 18 October 2007 04:23 pm ET

New images uncover 25 secrets about the Mona Lisa, including proof that Leonardo da Vinci gave her eyebrows, solving a long-held mystery.

The images are part of an exhibition, "Mona Lisa Secrets Revealed," which features new research by French engineer Pascal Cotte and debuts in the United States at the Metreon Center in San Francisco, where it will remain through the end of this year. The Mona Lisa showcase is part of a larger exhibition called "Da Vinci: An Exhibition of Genius."

Cotte, founder of Lumiere Technology, scanned the painting with a 240-megapixel Multi-spectral Imaging Camera he invented, which uses 13 wavelengths from ultraviolet light to infrared. The resulting images peel away centuries of varnish and other alterations, shedding light on how the artist brought the painted figure to life and how she appeared to da Vinci and his contemporaries.

"The face of Mona Lisa appears slightly wider and the smile is different and the eyes are different," Cotte said. "The smile is more accentuated I would say."

Behind a painting

The infrared images also revealed da Vinci's preparatory drawings that lie behind layers of varnish and paint, showing that the Renaissance man was also human.

"If you look at the left hand you see the first position of the finger, and he changed his mind for another position," Cotte said. "Even Leonardo da Vinci had hesitation."

Other revelations include:

In the larger picture, Cotte said when he stands back and looks up at the enlarged infrared image of Mona Lisa, her beauty and mystique are apparent.

"If you are in front of this huge enlargement of Mona Lisa, you understand instantly why Mona Lisa is so famous," Cotte said. He added, it's something you have to see with your own eyes.