It is a mystery which has divided experts for decades: Is the "Isleworth Mona Lisa" real? Yes, in case you didn’t know, there is a second version of Leonardo da Vinci’s Mona Lisa, which also depicts a ...

After a decade of work, French scientist Pascal Cotte claims there are hidden portraits underneath the Mona Lisa—including one of a distinctly different woman. Art experts are skeptical. As the BBC ...