Art detective says Mona Lisa is both male and female models

Mona Lisa's enigmatic smile draws millions of viewers from across the world, all eager to see the art world's most famous female face. But is it?

An Italian art detective is arguing that research backs his long-standing claim that Leonardo Da Vinci used both a female and male model to create the acclaimed Mona Lisa that hangs in Paris' Louvre museum.

While the identity of the woman is not certain, historians believe Lisa Gherardini, the wife of Florentine silk merchant Francesco del Giocondo, sat for Da Vinci for the painting.

But Silvano Vinceti, who heads Italy's . . .