Stock photography, photos: Middle-aged man Stock photos of Middleaged man model released with serious expression on his face Photograph: © Mark Hamilton Click for a larger image and more information Keywords associated with this stock photo: middle, aged,middle-aged 35, 40, 45, years, white, man, male,model, released, thoughtful, pensive, thinking, serious, impassive , sombre, sad, staring, trance, expression, expressionless, unmoved, face, mouth, ears, dark, low, key, hairy, eyebrows, hirsute, unshaven, unkempt, serious, threatening, superior, sideburns