@XXSpadeMasterXX,
http://www.wisegeek.com/what-is-pareidolia.htm
Pareidolia is a phenomenon in which people perceive meaning in abstract stimuli. One of the most classic examples of pareidolia is probably cloud-watching; many people have spent some time gazing at clouds and picking out fanciful shapes. In addition to being visible, pareidolia can also be auditory in nature. This phenomenon is a form of apophenia, a tendency to create patterns where none exist.
A number of theories to explain pareidolia have been posited by psychologists and people who study human development. Often, pareidolia takes the form of recognizing a human face in an abstract object, like a cinnamon bun or a rock, and some people have suggested that humans may be hardwired to recognize other humans, so they are especially attuned to face-like features. More likely, humans have learned to be very careful about potential predators, and the brain may overreact to something which looks like a potential threat in order to stay safe.
Whatever the cause, this psychological phenomenon manifests in all sorts of interesting ways. The Man in the Moon, for example, is another well-known instance of pareidolia, with many cultures around the world having some sort of myth which references a person living in the moon. Mysterious messages in static and the appearance of religious figures on fruit are also examples of pareidolia. Sometimes artists take advantage of this to embed hidden images in their work; Georgia O'Keeffe's flower paintings, for example, are often perceived as paintings of something else.