This combination of two photos shows on the left, a painting attributed to Leonardo da Vinci representing Mona Lisa, displayed during a presentation in Geneva, Switzerland, Thursday, Sept. 27, 2012 and on the right a 2004 file photo of the Mona Lisa painting by Da Vinci hanging in the Louvre in Paris. The Mona Lisa Foundation, a non-profit organization based in Zurich, Thursday presented what it claims is a predecessor of the world's most famous portrait. But even the experts brought in by the foundation weren't sure about that claim just yet. (AP Photo/Keystone, Yannick Bailly, Gregory Payan)
