Ключевые слова: adult, age, age difference, age group, aging, aging process, ancestors, beauty, change, comparison, concept, contrast, demographic, duality, elder, elderly, elderly care, evolution, experience, expression, face, facial, generations, growth, heritage, human, identity, juxtaposition, life, life stages, lineage, male, man, mature, maturity, old, person, portrait, senior, skin, time, timeless, transformation, transition, two faces, vitality, wisdom, wrinkles, young, youth,