A year after Richard Prince's Untitled (cowboy) photograph set a record for the most expensive photograph ever sold at auction, a study of a work from Richard Prince's series of Untitled (couples) considers the long history of the image and Prince as a pioneer of the approproated image. In Richard Prince's 1977 work Untitled (couple), difference mixes uncannily with sameness. We can't quite tell whether the shiny couple...