ART - Ancient Roman man hidden beneath famous painting at the Louvre

In the latest achievement in efforts to see what may lie underneath the surface of great works of art, scientists today described the first use of an imaging technology like that used in airport whole-body security scanners to detect the face of an ancient Roman man hidden below the surface of a wall painting in the Louvre Museum in Paris.

http://www.sciencedaily.com/releases/2013/04/130410154622.ht