Smile
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A smile is a facial expression formed primarily by flexing the muscles at the sides of the mouth. Some smiles include a contraction of the muscles at the corner of the eyes, an action known as a Duche
Detail of the Mona Lisa, who is known for her smile
A smiling child
A sonriente ceramic figurine, 600 to 1000 CE, Classic Veracruz culture. Although their purpose is uncertain, the profusion of these smiling figurines is distinctive since depictions of such expressions are uncommon in other Mesoamerican cultures.
Smiling Girl, a Courtesan, Holding an Obscene Image (1625) by Gerard van Honthorst. Humor has been noted as a source of inspiration for many notable Dutch Golden Age painters.
Frown
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A frown is a facial expression in which the eyebrows are brought together, and the forehead is wrinkled, usually indicating displeasure, sadness or worry, or less often confusion or concentration. The
Smile
…Facial Action Coding System Frown Say cheese…
In his 16th-century portrait of an unidentified man, Albrecht Dürer powerfully captures personality through facial expression, body language, and clothing. Work: Bildnis eines unbekannten Mannes (1521)
Photographs of frowning and crying children from The Expression of the Emotions in Man and Animals (1872) by Charles Darwin
Illustration of facial muscles and other tissue of the lateral human head and neck