Scientists extract a secret from the 'Mona Lisa' about how Leonardo painted the masterpiece

The research, published Wednesday in the Journal of the American Chemical Society, suggests that the famously curious, learned and inventive Italian Renaissance master may have been in a particularly experimental mood when he set to work on the 'Mona Lisa' early in the 16th century.

Scientists extract a secret from the 'Mona Lisa' about how Leonardo painted the masterpiece
The research, published Wednesday in the Journal of the American Chemical Society, suggests that the famously curious, learned and inventive Italian Renaissance master may have been in a particularly experimental mood when he set to work on the 'Mona Lisa' early in the 16th century.