When you looked directly at the Mona Lisa’s eyes, the smile seemed to fade, but from another angle, it brightened playfully. This effect, known as "sfumato" in Italian, meant it was unclear and ...

Some have suggested that the effects of lead poisoning on the prefrontal ... could have been a factor in Vincenzo’s theft of the Mona Lisa. In 1910, Vincenzo begins working at glassworks company ...

The researchers believe that this unique effect could even explain the appeal of great works of art like the Mona Lisa.

A replica of Leonardo da Vinci's famous Mona Lisa painting is going on sale in Paris, where it is expected to fetch up to €300,000 ($365,645; £257,813). Said to have been created by a follower ...