Modern science may have uncovered Da Vinci paintin...

A delicate portrait of a young girl, sold as a 19th-century work to a private collector, could be the work of the Renaissance master Leonardo da Vinci. So says scientists at a Paris lab which spent two years analysing the work using the latest digital technology. They have backed the hypothesis of an Oxford University emeritus professor who is publishing his thesis on the subject. Duration: 01:06.