What is pareidolia?

Pareidolia is a psychological phenomenon in which the mind responds to a stimulus, usually an image or a sound, by perceiving a familiar pattern where none exists (e.g. in random data).

Pareidolia can cause people to interpret random images, or patterns of light and shadow, as faces.

To find out more about Pareidolia I recommend to search the term “Pareidolia” or to read what Wikipedia has to say about the subject.