A Parisian engineer who has dedicated 3,000 hours to examining Leonardo Da Vinci's famous portrait now claims to have the answer.



Pascal Cotte says that ultra detailed digital scans of the 16th-century picture allow him to look into the past and see how the Florentine merchant's wife looked before years of restoration work.



Using the 240-megapixel scans, Mr Cotte, 49, says he can see traces of a left eyebrow long obscured from the naked eye by the efforts of the restorers.