Psychologists recently conducted a study in which people from widely disparate cultures were asked to examine five photographs  Each photograph depicted the face of a person expressing one of five basic human emotions -- fear, happiness, disgust, anger, and sadness  The people in the study were asked to identify the emotion being expressed in each photograph  For each photograph, everyone identified the same emotion
This shows that people are genetically predisposed to associate certain facial expressions with certain basic emotions
For each photograph, the emotion that the subjects agreed was being expressed was the emotion that the person photographed was, in fact, feeling.