What Determines How Old You Look: Science and Perception Perceived age is influenced by a mix of biological, environmental, and social cues. Facial structure, skin texture, hair color and density, and even gait contribute to how others estimate your age. Scientists studying facial perception have found that specific features—such as jawline definition, eye area smoothness, and skin elasticity—carry disproportionate weight in age judgements. These cues are processed almost instantly by observers, who use them to form impressions that often feel intuitive but are rooted in visual heuristics. Beyond anatomy, lifestyle factors like sun exposure, smoking, diet, and stress accelerate the appearance of aging. Chronic sun damage causes pigment changes and…