AVE6328343: Russia, 1950s: steam and smoke around machine / Bridgeman Images

AVE6328349: 1980s: Students walk in protest / Bridgeman Images

AVE6328353: Russia, 1950s: man in chair talks to camera / Bridgeman Images

AVE6328354: 1980s: Illustration of space station / Bridgeman Images

AVE6328357: 1980s: Illustration of pink space ship / Bridgeman Images

AVE6328361: 1980s: Model aircraft / Bridgeman Images

AVE6328375: Russia, 1950s: people look in shop windows / Bridgeman Images

AVE6328376: 1980s: Astronauts in space suits ride elevator up to enter rocket / Bridgeman Images

AVE6328379: 1980s: Man in suit sits in chair talking / Bridgeman Images

AVE6328388: Russia, 1950s: lady carries churn of milk / Bridgeman Images

AVE6328401: Russia, 1950s: students in large lecture hall / Bridgeman Images

AVE6328404: Russia, 1950s: Boys do woodwork class / Bridgeman Images

AVE6328406: Russia, 1950s: boy rides tractor / Bridgeman Images

AVE6328407: Russia, 1950s: lady reads paper in library / Bridgeman Images

AVE6328450: United States, 1960s: police man speaks to police officers in meeting / Bridgeman Images

AVE6328453: United States, 1960s: police officer speaks on radio at control / Bridgeman Images

AVE6328454: United States, 1960s: police officer drives at night / Bridgeman Images

AVE6328455: United States, 1960s: police officer speaks on radio in car at night / Bridgeman Images

AVE6328459: United States, 1960s: police officer points to keep calm words on blackboard / Bridgeman Images

AVE6328461: United States, 1960s: police officers speak in classroom / Bridgeman Images

AVE6328466: United States, 1960s: police officer talks to men after presentation in classroom / Bridgeman Images

AVE6328468: United States, 1960s: police officer talks to men after presentation in classroom / Bridgeman Images

AVE6328474: United States, 1960s: police officer talks to men after presentation in classroom / Bridgeman Images

AVE6328477: United States, 1960s: police officer talks to lady in car at night / Bridgeman Images

AVE6328485: United States, 1960s: police man removes cord from baby's neck / Bridgeman Images

AVE6328498: United States, 1960s: police officer helps deliver placenta in car / Bridgeman Images

AVE6328501: United States, 1960s: police man create tie / Bridgeman Images

AVE6324557: Researcher Assesses Ability of Clothing to Protect Farmer from Chemical Sprays / Bridgeman Images

AVE6324559: Scientist Moves Pads from Man's Outfit Ready for Testing / Bridgeman Images

AVE6324560: Lady Picks up Apple from Basket / Bridgeman Images

AVE6324566: Scientist Pours Liquid into Glass Beaker in Lab / Bridgeman Images

AVE6324575: Warning Label on Bottle of Pesticide / Bridgeman Images

AVE6324576: Man in Yard Works with Pesticides / Bridgeman Images

AVE6324586: Men Collect Medicines from Pharmacy / Bridgeman Images

AVE6324589: 1910s: Young girl gazes out of window at other girls playing outside / Bridgeman Images

AVE6324596: 1910s: Girl sits in cramped space playing with a doll / Bridgeman Images