Scientists discover painting hidden behind Picasso masterpiece

Scientists examining a work by Pablo Picasso using x-ray technology have discovered that he painted it over a landscape painting by an unknown artist.It was painted during Picasso's Blue Period, when he mainly used monochromatic shades of blue and blue-green.The researchers' technique allowed them to study the painting in-depth in just 24 hours, and revealed the horizontal landscape created by a different Barcelona painter, whose identity remains unknown, under the visible surface of Picasso's p