AVE8900778: 1960s: Person squeezes a little water from hanging dropper into beaker. Person takes notes in binder. Glass vessel and bottle nearby. / Bridgeman Images

AVE8900750: 1960s: Victorian family sits at Christmas dinner table and talks. / Bridgeman Images

AVE8900765: 1960s: Four Native Americans sitting outside of a teepee talking. / Bridgeman Images

AVE8900789: 1960s: Historical reenactment of Native Americans giving food to settlers at a Fort gate. / Bridgeman Images

AVE8900809: 1950s: Boy turns the crank on a manual ice cream churn while a girl sprinkles rock salt on the ice. Older boy takes over cranking. / Bridgeman Images

AVE8900817: 1950s: Steam locomotive pulls box cars out of a freight yard. / Bridgeman Images

AVE8900242: 1960s: Portrait of Jean-Baptiste Lamarck. / Bridgeman Images

AVE8900260: 1960s: Close up of chickens in cages, pan to exterior of cages. / Bridgeman Images

AVE8900271: 1960s: Man looking at fossil on display, pan to fossil. / Bridgeman Images

AVE8900322: 1960s: Long shot of factory, water tower, hands holds up ball on string in foreground. / Bridgeman Images

AVE8900653: 1960s: Lion licks its lips and stands near stones and tree. / Bridgeman Images

AVE8900658: 1960s: Knights on horseback and foot soldiers walk through medieval farmlands. / Bridgeman Images

AVE8900700: 1960s: Horned animal or object lies in the grass. / Bridgeman Images

AVE8900707: 1960s: A meadow at dusk, a bison walks across. / Bridgeman Images

AVE8900693: 1960s: Human brain with discoloured cerebellum sits on balled up cloth on lab table. / Bridgeman Images

AVE8900743: 1960s: Victorian girls put doll in pram and walk away. / Bridgeman Images

AVE8900755: 1960s: Victorian woman prepares pie and desserts at kitchen table. Man and woman talk at kitchen table. / Bridgeman Images

AVE8900828: 1960s: A glass beaker of cloudy liquid with straw in it sits on counter. / Bridgeman Images

AVE8900925: 1950s: Mallard drake swims in a garden pond near. It quacks. / Bridgeman Images

AVE8900912: 1960s: Side view photograph of Otto von Bismarck as an older man. / Bridgeman Images

AVE8900228: 1960s: Close up pan of dinosaur figurine. / Bridgeman Images

AVE8900315: 1960s: Close up, liquid in test tubes, hand swirls test tube. / Bridgeman Images

AVE8901027: 1960s: fingers pull petals off of a daisy, hands split head of daisy open, point, stroke stem / Bridgeman Images

AVE8901057: 1960s: Close up of plant roots. / Bridgeman Images

AVE8901062: 1960s: Magnified view of organisms. / Bridgeman Images

AVE8901070: 1960s: stone bust of Plato against a black background, showing detailed hair, large Mustache and full beard / Bridgeman Images

AVE8901074: 1960s: Man in period costume walks through gate, approaches house, knocks on door, enters. / Bridgeman Images

AVE8901096: 1960s: grass, bushes and trees, man in Native American costume creeps through brush, notches arrow in bow, another man with bow and arrow joins him as they sneak through the vegetation / Bridgeman Images

AVE8901131: 1960s: Death mask of Isaac Newton, zoom in. / Bridgeman Images

AVE8901146: 1960s: Underside of helicopter blade, tilt down. / Bridgeman Images

AVE8901149: 1960s: View of helicopter, underside of blade. / Bridgeman Images

AVE8901156: 1960s: Panning shot of plane landing on runway. / Bridgeman Images

AVE8901157: 1960s: Long shot of kite flying. / Bridgeman Images

AVE8901081: 1960s: Man in period costume writing at desk. / Bridgeman Images

AVE8901100: 1960s: painted turtle in grass near tree root with neck extended looks around as wind blows grass / Bridgeman Images

AVE8901108: 1960s: Man in period costume sleeping, sits up, lights candle, gets out of bed. / Bridgeman Images