AVE6323689: United States, 1960s: men prepare crash test dummies inside impact sled / Bridgeman Images

AVE6323716: United States, 1960s: vehicles crash into guard rails on proving ground track / Bridgeman Images

AVE6323728: United States, 1970s: man in safari hat talks to camera from desk / Bridgeman Images

AVE6323773: United States, 1970s: girl interviews adults / Bridgeman Images

AVE6323779: United States, 1970s: lady talks to microphone / Bridgeman Images

AVE6323782: United States, 1960s: man measures pollution from car in lab / Bridgeman Images

AVE6323812: United States, 1960s: view across car manufacture plant / Bridgeman Images

AVE6323824: United States, 1960s: man points at board with stick / Bridgeman Images

AVE6323839: United States, 1960s: lady tests water quality at car factory / Bridgeman Images

AVE6320998: 1960s: Conductor points to singer / Bridgeman Images

AVE6321052: 1950s: Wagon wheels in grass / Bridgeman Images

AVE6321064: 1950s: Woman and boy riding in wagon / Bridgeman Images

AVE6321067: 1950s: Mother and children ride on covered wagon / Bridgeman Images

AVE6321133: United States, 1970s: A middle-aged man attacks an older man who is walking down the sidewalk / Bridgeman Images

AVE6321136: United States, 1970s: Two men stare at a no loitering sign as a man in red walks from a sidewalk into an alley / Bridgeman Images

AVE6321157: United States, 1970s: Corroded Iron Railings / Bridgeman Images

AVE6321163: United States, 1970s: Lab Experiment to Show Reactivity of Sodium / Bridgeman Images

AVE6321175: United States, 1970s: Scientific Equations on a Blackboard / Bridgeman Images

AVE6321275: United States, 1950s: Housewife shopping for groceries at supermaket / Bridgeman Images

AVE6324357: United States: 1950s: Man reads paper to microphone. / Bridgeman Images

AVE6324369: United States: 1950s: Close up of paper as man makes phone call. / Bridgeman Images

AVE6324381: 1930s: Driving down road, around bend, behind car / Bridgeman Images

AVE6324384: 1930s: Girl runs down road / Bridgeman Images

AVE6324393: United States: 1950s: Graph shows allowable radiation dose after burst. / Bridgeman Images

AVE6324396: 1930s: Title card / Bridgeman Images

AVE6324521: People and Machines Spraying Modern Pesticides / Bridgeman Images

AVE6324530: Lady Writing Notes During Experiment in Lab / Bridgeman Images

AVE6324587: 1910s: A series of characters with varying expressions and costumes / Bridgeman Images

AVE6324599: 1910s: Girl rushes over to an adult woman and speaks to her, they both approach a line of girls and question them / Bridgeman Images

AVE6324608: 1910s: Young boy pulls an object out of a box hanging on a kitchen wall, then puts it in his pocket / Bridgeman Images

AVE6324629: 1910s: A building burns while firefighters flee from the scene / Bridgeman Images

AVE6324644: 1910s: Young man inspects young woman’s dress as she shows it off to him / Bridgeman Images

AVE6324653: United States, 1930s: Diagram of the ear drum and inner ear structures / Bridgeman Images

AVE6324680: United States, 1930s: diagram of the inner ear anatomy; oval window, round window, and cochlea / Bridgeman Images

AVE6323912: United States, 1940s: man in study talks to camera / Bridgeman Images

AVE6323915: United States, 1940s: animation of star in space / Bridgeman Images