AVE6328807: United States, 1940s: Animated circles on red background / Bridgeman Images

AVE6328810: 1920s: Child in costume stands on top of hot-air balloon, waving / Bridgeman Images

AVE6328812: United States, 1940s: Cartoon man against red brick wall / Bridgeman Images

AVE6328814: United States, 1940s: Shoes walking up steps / Bridgeman Images

AVE6328820: United States, 1940s: Two men on horses have conversation / Bridgeman Images

AVE6328901: United States, 1970s: man leaves house / Bridgeman Images

AVE6328902: United States, 1970s: car in driveway at night / Bridgeman Images

AVE6328017: United States, 1950s: Crowds celebrate the efforts of the Allied armies in saving them from dictatorship / Bridgeman Images

AVE6328021: United States, 1950s: Allied soldiers celebrate the defeat of Germany in World War II / Bridgeman Images

AVE6328023: United States, 1950s: Weapons produced in Germany are loaded into trucks by soldiers / Bridgeman Images

AVE6328030: United States, 1950s: American soldiers parachute off a plane to search of German scientists who created V2 program / Bridgeman Images

AVE6328036: United States, 1940s: Teenagers sitting in audience listening to speech / Bridgeman Images

AVE6328045: United States, 1940s: Teenagers leave auditorium / Bridgeman Images

AVE6328047: United States, 1940s: Teenagers sitting in audience / Bridgeman Images

AVE6328054: United States, 1940s: Teenagers hold up banner / Bridgeman Images

AVE6328057: United States, 1940s: Teacher giving speech to teenagers / Bridgeman Images

AVE6328062: United States, 1940s: Teenager takes tablets from cabinet / Bridgeman Images

AVE6328064: United States, 1940s: Teenagers carry banner / Bridgeman Images

AVE6328090: United States, 1960s: Close up of man's face / Bridgeman Images

AVE6328096: United States, 1960s: Planet Earth spins in space / Bridgeman Images

AVE6328099: United States, 1960s: Under the sea animation / Bridgeman Images

AVE6328104: United States, 1960s: one in ten billion animation / Bridgeman Images

AVE6328115: Europe, 1940s: collapsed building / Bridgeman Images

AVE6328118: Europe, 1940s: children in bandages and worn clothes walk through street / Bridgeman Images

AVE6328121: Europe, 1940s: child lies on ground / Bridgeman Images

AVE6328129: Europe, 1940s: children search for food on streets, rubble sites, and in bins / Bridgeman Images

AVE6328141: Europe, 1940s: damaged building after war / Bridgeman Images

AVE6328151: United States, 1960s: man looks through microscope / Bridgeman Images

AVE6328154: United States, 1960s: animated electron and proton / Bridgeman Images

AVE6328158: United States, 1960s: animation of bat using radar and in flight / Bridgeman Images

AVE6328167: United States, 1960s: Boy walks through trees with man / Bridgeman Images

AVE6328170: Europe, 1940s: crowds push through lines / Bridgeman Images

AVE6328172: Europe, 1940s: malnourished baby in crib / Bridgeman Images

AVE6328178: UNITED STATES: 1981: Men walking along corridors at NASA. / Bridgeman Images

AVE6328181: Europe, 1940s: hand delivers telegram / Bridgeman Images

AVE6328182: UNITED STATES: 1981: Scientist helps astronaut into space suit. / Bridgeman Images