25-29 years, 35-39 years, arms crossed, attitude, attraction, boyfriend, break, business, businessman, businesswoman, caucasian, co-worker, color image, confrontation, day, desire, difficulty, face to face, full length, girlfriend, heterosexual couple, horizontal, indoors, leaning, legs crossed, locker, locker room, man, mid adult, office, people, photography, privacy, problem, security, side view, standing, talking, tension, together, two people, window, woman, work romance, young adult, europe

25-29 years, aggression, caucasian, close up, color image, crack, cracking, cut out, delicate, displaying, egg, emergence, fertility, food and drink, force, fragile, growth, healthy eating, holding, horizontal, human hand, life events, one person, people, photography, power, pressure, single object, squeezing, strength, stress, studio shot, tension, vulnerability, white, white background, woman, young adult, europe, european, 20's, 20-25, 20-30, 20s, 25-30, adult, advancement, aggressive, anxiet

Isaac Merrit Singer (1811-75), American inventor, while his friend George Zieber holds the candle, adjusting tension on his sewing machine in a last desperate attempt to make it work (August/September 1850). Machine patented 185.

20-24 years, action, adversity, aggression, angry, arguing, argument, arms outstretched, battling, boxing glove, business, businessman, businesswoman, caucasian, challenge, co-worker, color image, competition, conflict, copy space, day, determination, difficulty, energy, eyes closed, fighting, fun, grimacing, head and shoulders, hitting, horizontal, hurting, indoors, knock out, man, office, people, photography, problem, punching, punishment, side view, strength, stress, tension, two people, viol

20-24 years, action, adversity, aggression, angry, arguing, argument, arms outstretched, battling, boxing glove, business, businessman, caucasian, challenge, chinese ethnicity, co-worker, color image, competition, conflict, copy space, day, determination, difficulty, energy, eyes closed, fighting, grimacing, head and shoulders, hitting, horizontal, hurting, indoors, knock out, man, multi-ethnic group, office, people, photography, problem, punching, side view, strength, stress, tension, two peopl

Miner checking the installed tension of a roof bolt by using a torque wrench, International Nickel Company of Canada, Ontario, Canada

20-24 years, angry, anxiety, business, businessman, caucasian, color image, concentration, copy space, crumpled, day, discarded, eyes closed, failure, front view, frustration, head and shoulders, head in hands, headache, illness, indoors, leaning, low angle view, man, office, one person, paper, people, photography, pressure, problem, serious, stress, suit, surface level, table, tension, thinking, troubling, uncertain, vertical, vulnerability, wondering, working, working late, worrying, young adu