AVE6320912: 1960s: Man sits playing piano then starts talking / Bridgeman Images

AVE6320916: 1960s: Bluegrass band stands playing before audience / Bridgeman Images

AVE6320921: 1960s: Sitting crowd watches as men and women wearing formal clothing dance at the front of the room, while men play banjo, guitar and violin in the background / Bridgeman Images

AVE6320927: 1960s: View of tall building, then busy city streets with many people walking and cars driving / Bridgeman Images

AVE6320928: 1960s: View of various buildings and signs / Bridgeman Images

AVE6320931: 1960s: City street crowded with people and streetlights / Bridgeman Images

AVE6320933: 1960s: Men wearing headphones sit at console and make adjustments to it / Bridgeman Images

AVE6320944: 1960s: Men playing various stringed instruments sing into microphones / Bridgeman Images

AVE6320947: 1950s: Slow-motion view of activity in human larynx / Bridgeman Images

AVE6320957: 1960s: Close up view of woman with light hair blowing in wind singing into microphone / Bridgeman Images

AVE6320970: 1960s: Hand waves and conducts orchestra / Bridgeman Images

AVE6320971: 1960s: Vocalist sings into microphone and reads music / Bridgeman Images

AVE6320976: 1960s: Musical trio plays instruments on stage / Bridgeman Images

AVE6320978: 1960s: Man smiles and plays drums / Bridgeman Images

AVE6320987: 1960s: Man sits on sofa and speaks / Bridgeman Images

AVE6320993: 1960s: Man strikes bell near microphone / Bridgeman Images

AVE6321048: 1950s: Man riding horse / Bridgeman Images

AVE6321049: 1950s: Train of wagons in desert / Bridgeman Images

AVE6321053: 1950s: Family eating in grass next to covered wagons / Bridgeman Images

AVE6321056: 1950s: Low angle pan, boy walking, woman and boy in wagon / Bridgeman Images

AVE6321063: 1950s: Woman tucks girl into bed, lays under blanket / Bridgeman Images

AVE6321066: 1950s: Close up of men pushing wagon / Bridgeman Images

AVE6321619: United States, c.1950: Fire blazes, smoke billows, a firefighter stands in a nest, blasting water from a hose / Bridgeman Images

AVE6321621: United States, c.1950: Teacher stands at head of elementary school classroom filled with students at desks, a girl raises her hand, is called upon, stands and asks a question / Bridgeman Images

AVE6321626: United States, c.1950: School children play baseball on playground, boy reacts to hearing siren, children drop toys and enter school building / Bridgeman Images

AVE6321628: United States, c.1950: Children play in backyard / Bridgeman Images

AVE6321630: 1980s: Slow motion film as car approaches test barrier / Bridgeman Images

AVE6321632: United States, c.1950: A mother applies salve ointment to her son's neck, shoulders, chest, and back / Bridgeman Images

AVE6321638: United States, c.1950: Older students lead younger students into hallway, older student demonstrates duck and cover while another older student directs attention to his technique / Bridgeman Images

AVE6321639: United States, c.1950: Older students lead younger students into hallway, older student demonstrates duck and cover / Bridgeman Images

AVE6321647: 1980s: Text on screen / Bridgeman Images

AVE6321648: 1980s: Text on screen / Bridgeman Images

AVE6321649: 1980s: Crash test dummy slams into windshield / Bridgeman Images

AVE6321661: United States, 1940s: Comparison of two panels with flies, flies die on side coated with DDT / Bridgeman Images

AVE6321662: United States, 1940s: Woman walks into closet / Bridgeman Images

AVE6321668: United States, 1940s: Man painting pesticide on window / Bridgeman Images