Is There a Hidden Drawing Beneath the 'Mona Lisa'?

Newly detailed high-resolution scans show traces of a charcoal underdrawing

Hidden portrait 'found under the Mona Lisa', could lead to it being renamed, The Independent

Scientist Discovers Hidden Drawing Beneath the 'Mona Lisa' –

Scientist Discovers Hidden Portrait Beneath The Mona Lisa

French scientist 'discovers hidden portrait' beneath surface of da Vinci's masterpiece 'Mona Lisa' – New York Daily News

Review: Secrets of the Mona Lisa. Join art historian Andrew Graham Dixon…, by Leigh-Anne Dennison

The Mona Lisa by Leonardo da Vinci

Mona Lisa second portrait spotted under Leonardo da Vinci's masterpiece

Leonardo da Vinci news: Mona Lisa's hidden dots show secret alterations to famous painting, World, News

Unusual history of the Mona Lisa

Mona Lisa Underdrawing Researchers Discover a Hidden Drawing Behind 'Mona Lisa

Male Mona Lisa theories - Wikipedia