AVE6321487: United States, 1940s: Rows of glass jars on a conveyer belt move through a machine that fills each jar with cottage cheese, then caps the jars / Bridgeman Images

AVE6321520: Coronation Ceremony in Delhi, India / Bridgeman Images

AVE6321544: Romanov 300th anniversary, Dynasty Tour in Europe / Bridgeman Images

AVE6321560: United States, 1970s: Extreme low angle of boy and girl, boy pours Lego pieces from box / Bridgeman Images

AVE6321566: United States, 1970s: Pacifier on table, baby's hand reaches out / Bridgeman Images

AVE6321581: United States, 1970s: Child's hands put Lego pieces together, move pieces / Bridgeman Images

AVE6321626: United States, c.1950: School children play baseball on playground, boy reacts to hearing siren, children drop toys and enter school building / Bridgeman Images

AVE6321632: United States, c.1950: A mother applies salve ointment to her son's neck, shoulders, chest, and back / Bridgeman Images

AVE6321638: United States, c.1950: Older students lead younger students into hallway, older student demonstrates duck and cover while another older student directs attention to his technique / Bridgeman Images

AVE6321647: 1980s: Text on screen / Bridgeman Images

AVE6321662: United States, 1940s: Woman walks into closet / Bridgeman Images

AVE6321668: United States, 1940s: Man painting pesticide on window / Bridgeman Images

AVE6321674: United States, 1940s: Woman opens piano top, sprays pesticide inside / Bridgeman Images

AVE6321677: United States, 1940s: Hands spray pesticide from canister / Bridgeman Images

AVE6320851: 1960s: Record spins in machine / Bridgeman Images

AVE6320869: 1960s: Man in headphones changes out cassette tapes, presses buttons / Bridgeman Images

AVE6320908: 1960s: People dance in street as part of funeral procession / Bridgeman Images

AVE6320944: 1960s: Men playing various stringed instruments sing into microphones / Bridgeman Images

AVE6320947: 1950s: Slow-motion view of activity in human larynx / Bridgeman Images

AVE6320971: 1960s: Vocalist sings into microphone and reads music / Bridgeman Images

AVE6321049: 1950s: Train of wagons in desert / Bridgeman Images

AVE6321094: United States, 1970s: After arriving at the scene of investigation, two cops inspect an unconscious woman on the ground and ask questions to bystanders / Bridgeman Images

AVE6321100: United States, 1970s: As he enters an alley in the middle of the day, a man is surrounded by a gang / Bridgeman Images

AVE6321121: United States, 1970s: After calling for a taxi, a woman is picked up by a man in a red convertible / Bridgeman Images

AVE6324219: United States 1950s: Medium close up of a scientist operating robotic limbs / Bridgeman Images

AVE6324222: United States 1950s: Two lab technicians use a dropper to administer test liquid on a chicken / Bridgeman Images

AVE6324225: United States 1950s: A lab technician uses a radiation testing machine to read the emissions from a stack of gallium blocks / Bridgeman Images

AVE6324234: United States 1950s: A children's ward at a research hospital / Bridgeman Images

AVE6324246: United States 1950s: Scientists build a green house inside a building / Bridgeman Images

AVE6324255: United States 1950s: A man climbs up a telephone pole as manufacturing plants emit smoke / Bridgeman Images

AVE6324270: 1970s: UNITED STATES: side profile of face. Playing cards on table. / Bridgeman Images

AVE6324273: 1970s: UNITED STATES: Girls walk along street. / Bridgeman Images

AVE6324291: 1970s: UNITED STATES: girl cooks in kitchen. Girl puts lid on pan. / Bridgeman Images

AVE6324303: 1970s: UNITED STATES: students smoke at home together. / Bridgeman Images

AVE6324315: 1970s: UNITED STATES: side profile of girl in car. / Bridgeman Images

AVE6324342: United States: 1950s: man picks up geometric stationary to draw on maps. / Bridgeman Images