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

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

The Tale of Mona Lisa and the Hidden Animals – Mad Art Lab

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

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

Mona Lisa by Leonardo da Vinci: 12 Fun facts and history - Snippets of Paris

Hidden Portrait Found Under 'Mona Lisa' Painting - ABC News

The Mona Lisa Effect - by Ian Leslie - The Ruffian

Is There a Hidden Drawing Beneath the 'Mona Lisa'?, Smart News

High-Res Image Scan Detects Hidden Drawing Under The 'Mona Lisa

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

Leonardo da Vinci may have painted another 'Mona Lisa.' Now, there's a legal battle over who owns it

How Leonardo da Vinci Made Mona Lisa Smile - The Atlantic

Original Portrait of the Mona Lisa Found Beneath the Paint Layers of da Vinci's Masterpiece