Last Night, poster. Photograph of chimpanzees in black and white. Did you know that chimpanzees are significantly better than humans on visual memory tests? Researchers came up with it as late as 2007 and if there are any living creatures that could be said to have photographic memory, they are chimpanzees. The poster has a white surface around the collage that highlights the motif. If you choose a frame and mat in the same size as the poster, everything fits perfectly. Frame and mat are not included. Printed on matte uncoated paper.