Painting Could Be Previously Unknown Da Vinci Work [audio 3 minutes 51 seconds]

A portrait by Leonardo da Vinci may have been discovered thanks to a centuries-old fingerprint. Art collector Peter Silverman, who paid $19,000 for the painting, Profile of the Bella Principessa, on behalf of an anonymous Swiss collector two years ago, says a spectral camera penetrated the varnish, and found a print comparable to similar ones found on other works by da Vinci.