Scientists winkle a secret from the `Mona Lisa’ about how Leonardo painted the masterpiece | AP News
PARIS (AP) — The “Mona Lisa” has given up another secret.Using X-rays to peer into the chemical structure of a tiny speck of the celebrated work of art, scientists have gained new insight into the techniques that Leonardo da Vinci used to paint his groundbreaking portrait of the woman with the exquisitely enigmatic smile.The research