There's only one Mona Lisa! Why a 10-year study got it all wrong

After a decade of research, a scientist claims to have found the portrait of another woman under Leonardo’s greatest work. Here’s why he’s so mistakenWho is the Mona Lisa, really? There are two answers – and French scientist Pascal Cotte has got both of them wrong.Cotte has told a BBC documentary about his 10-year study of Leonardo da Vinci’s most famous painting using the Layer Amplification Method (LAM). When you look down through the layers of Leonardo’s pa