AVE6320523: United States, 1950s: lady opens bedroom door / Bridgeman Images

AVE6320541: 1950s: Toddler on toilet pushes Mother / Bridgeman Images

AVE6320544: United States, 1960s: animation of valves as they open and close with blood flow in heart / Bridgeman Images

AVE6320556: United States, 1960s: lady pulls back sheet on bed / Bridgeman Images

AVE6320559: 1950s: Mother smiles and toddler laughs and falls on the floor / Bridgeman Images

AVE6320565: 1950s: Mother feeds baby as meal sits on table / Bridgeman Images

AVE6320358: Unites States, 1970s: view of planet Earth from space / Bridgeman Images

AVE6320373: Unites States, 1970s: wave crashes into coastal protection / Bridgeman Images

AVE6320391: Unites States, 1970s: quarry truck on road / Bridgeman Images

AVE6320409: Anemone catches fish, Unites States, 1970s / Bridgeman Images

AVE6320434: Unites States, 1970s: men pole catch tuna from sea / Bridgeman Images

AVE6320482: United States, 1970s: High angle view of city traffic / Bridgeman Images

AVE6320485: United States, 1970s: Traffic on highway / Bridgeman Images

AVE6320518: United States, 1960s: boys play fight in garden / Bridgeman Images

AVE6320521: United States, 1950s: Lady tucks boy into bed / Bridgeman Images

AVE6320530: United States, 1950s: lady shows baby storm through window / Bridgeman Images

AVE6320757: United States, 1950s: Long shot, tractor lifted by crane / Bridgeman Images

AVE6320729: United States, 1950s: City square, officials ride horses through crowd / Bridgeman Images

AVE6320832: 1950s: Full moon over city / Bridgeman Images

AVE6320777: 1970s: Section of brain viewed through microscope / Bridgeman Images

AVE6320859: 1960s: Band plays on stage / Bridgeman Images

AVE6320825: 1970s: Boy plays with balloon / Bridgeman Images

AVE6320874: 1960s: Men sing into microphone as band plays in recording booth / Bridgeman Images

AVE6320855: 1960s: Woman in coat sings as violinists play behind her / Bridgeman Images

AVE6321575: United States, 1970s: Panning shot, man skips on sidewalk / Bridgeman Images

AVE6321973: Actor Playing Michael Faraday Works in a Science Lab / Bridgeman Images

AVE6321976: Coal Moving Along a Conveyor Belt inside Mine / Bridgeman Images

AVE6321997: Man Operates Lumber Machinery / Bridgeman Images

AVE6322009: Man Carries Heavy Coal into House for Stove / Bridgeman Images

AVE6321629: United States, c.1950: School bus drives down suburban street, young children sit in seats / Bridgeman Images

AVE6322016: United States, 1950s: man wearing lab coat, man speaking to another man / Bridgeman Images

AVE6322049: United States, 1950s: Boy eats Cracker Jack / Bridgeman Images

AVE6322122: 1940s: Fishing trawler tows dories through fjords / Bridgeman Images

AVE6321916: 1940s: Houses and cars on residential street / Bridgeman Images

AVE6321975: Picture of Oil Fields / Bridgeman Images

AVE6321984: Men Work on One Section of a Giant Turbine / Bridgeman Images