Jeanne Louise Calment was a French supercentenarian and, with a documented lifespan of 122 years and 164 days, is the world's oldest verified person. Her longevity attracted media attention and medical studies of her health and lifestyle. She is the only person verified to have reached the age of 120.

Longevity may refer to especially long-lived members of a population, whereas life expectancy is defined statistically as the average number of years remaining at a given age. For example, a population's life expectancy at birth is the same as the average age at death for all people born in the same year.