Van Gogh's Hidden Portrait

A previously unknown portrait of a woman by Vincent van Gogh has been revealed in a high-tech look beneath another of his paintings, it was announced today. Scientists used a new technique to peer beneath the paint of van Gogh's "Patch of Grass." Already it was known there was something there, likely a portrait of some sort. Van Gogh was known to paint over his work, perhaps as much as a third of the time. Behind the painting, done mostly in greens and blues, is a portrait of a woman rendered in browns and reds. msnbc.