A hairstyle, hairdo, or haircut refers to the styling of hair, usually on the human scalp. The fashioning of hair can be considered an aspect of personal grooming, fashion, and cosmetics, although practical, cultural, and popular considerations also influence some hairstyles. The oldest known depiction of hair braiding dates back about 30,000 years. In ancient civilizations, women's hair was often elaborately and carefully dressed in special ways.