Geochronology

A smiley, also known as a smiley face, is a basic ideogram representing a smiling face. Since the 1950s, it has become part of popular culture worldwide, used either as a standalone ideogram or as a form of communication, such as emoticons. The smiley began as two dots and a line representing eyes and a mouth. More elaborate designs emerged in the 1950s, featuring noses, eyebrows, and outlines. New York radio station WMCA used a yellow and black design for its "Good Guys!" campaign in the early