AVE6322337: 1950s: Men and women sit and speak / Bridgeman Images

AVE6322342: 1950s: Abandoned schoolhouse / Bridgeman Images

AVE6322343: 1950s: School library / Bridgeman Images

AVE6322356: United States, 1960s: lady stacks groceries on conveyor belt / Bridgeman Images

AVE6322362: 1950s: Meeting / Bridgeman Images

AVE6322372: 1920s: Fun Factory titles card with illustration of cops and men in a car / Bridgeman Images

AVE6322373: 1950s: Factory / Bridgeman Images

AVE6322377: 1920s: large fat man squeezes into desk chair in classroom with boys and girls / Bridgeman Images

AVE6322380: 1950s: Children walk through lunch line / Bridgeman Images

AVE6322381: 1920s: police car explodes in a puff of smoke / Bridgeman Images

AVE6322415: United States, 1970s: Young man sprays red paint onto camera lens / Bridgeman Images

AVE6322450: United States, 1970s: Young man scrubs graffiti off of bathroom stall under supervision, another young man talks to the camera, young man stops another young man from painting graffiti on a wall, a young woman talks to the camera, an older woman talks to the camera / Bridgeman Images

AVE6322467: United States, 1980s:researchers put biological experiments together on earth before space mission leaves / Bridgeman Images

AVE6322472: United States, 1950s: Waves on pond surface / Bridgeman Images

AVE6322477: United States, 1980s:computer model shows impacts of gravity on human brain / Bridgeman Images

AVE6322480: United States, 1950s: View of oscilloscope, zoom in, hand turns knob, lights dim / Bridgeman Images

AVE6322488: United States, 1950s: Animation of sound waves hitting ear drum / Bridgeman Images

AVE6322491: United States, 1950s: Animation of sound waves inside ear / Bridgeman Images

AVE6322494: United States, 1950s: Animation of sound waves inside ear / Bridgeman Images

AVE6322505: United States, 1950s: View of walls in sound chamber / Bridgeman Images

AVE6325646: United States, 1950s: Runner jumps hurdle / Bridgeman Images

AVE6325665: United States, 1950s: Two men on set, stand and throw basketball / Bridgeman Images

AVE6325673: Men with Safety Goggles Move Hot Metal in Pot / Bridgeman Images

AVE6325679: Prototype Object / Bridgeman Images

AVE6325692: 1960s: Typewritten warning sign about smoking. / Bridgeman Images

AVE6325699: 1960s: Tumors on back of lab mouse. / Bridgeman Images

AVE6325702: 1960s: Man removes cigarette from tube and takes a drag. / Bridgeman Images

AVE6325703: 1960s: Smoke and bubbles fill bottom of glass tube. / Bridgeman Images

AVE6325713: United States, 1970s: Panning shot from control tower, plane takes off from runway / Bridgeman Images

AVE6325714: United States, 1970s: City skyline, planes on runway / Bridgeman Images

AVE6325716: United States, 1970s: Panning shot of plane flying / Bridgeman Images

AVE6325723: United States, 1970s: Plane flies over metal fence / Bridgeman Images

AVE6325724: United States, 1970s: Plane flies overhead / Bridgeman Images

AVE6325738: United States, 1970s: Teenage girl sits on car hood at mountain overlook then gets up and walks away / Bridgeman Images

AVE6325740: United States, 1970s: Teenage boys and girls with long hair get out of car on mountain overlook / Bridgeman Images

AVE6325743: United States, 1970s: Teenage kids sit in old car In the woods / Bridgeman Images