AVE6321975: Picture of Oil Fields / Bridgeman Images

AVE6321984: Men Work on One Section of a Giant Turbine / Bridgeman Images

AVE6321987: Wires and Transformers at a Power Station / Bridgeman Images

AVE6321999: Crane Lifting Skip / Bridgeman Images

AVE6322002: Elevator Inside a Department Store / Bridgeman Images

AVE6322008: Man Reads by Candle Light / Bridgeman Images

AVE6322014: United States, 1950s: close up of a telephone, telephone on table, man answers telephone / Bridgeman Images

AVE6322023: United States, 1950s: man speaking to another man, man walks away / Bridgeman Images

AVE6322029: United States, 1950s: View of banner, pan up to tower / Bridgeman Images

AVE6322062: United States, 1950s: Close up of girl in audience / Bridgeman Images

AVE6322065: United States, 1950s: Man climbs up ladder at circus / Bridgeman Images

AVE6322074: United States, 1950s: Woman climbs up ladder at circus, stands on trapeze / Bridgeman Images

AVE6322117: 1940s: Snow-capped mountains and fjords / Bridgeman Images

AVE6322157: 1940s: Man cuts tongues from cod heads / Bridgeman Images

AVE6322163: 1980s: A man mounts a model of an airplane on a post / Bridgeman Images

AVE6322178: 1980s: A pilot in the cockpit of a flight simulator speaks into his radio / Bridgeman Images

AVE6322196: 1980s: View from fighter pilot's cockpit as his airplane spins / Bridgeman Images

AVE6322214: USA, 1950s: Organisms moving around on a microscopic slide / Bridgeman Images

AVE6322226: 1980s: A jet engine / Bridgeman Images

AVE6322229: 1980s: Men talk into headsets and radios in a busy control room / Bridgeman Images

AVE6322235: 1980s: The Space Shuttle Enterprise flies through the air / Bridgeman Images

AVE6322238: 1980s: Wheels touch down on a runway / Bridgeman Images

AVE6322262: United States, 1940s: Workers Gather Food Crops by Hand in Baskets / Bridgeman Images

AVE6322324: 1950s: Men look at blueprint on construction site / Bridgeman Images

AVE6322176: USA, 1950s: Animation to show how much carbohydrate is needed per day / Bridgeman Images

AVE6322357: 1950s: Bus driver stops bus and opens door / Bridgeman Images

AVE6322319: 1950s: Schoolhouse in disrepair / Bridgeman Images

AVE6322421: United States, 1970s: Youths playing basketball / Bridgeman Images

AVE6322448: United States, 1970s: Various paintings around a city, a group of young people painting a wall, a police officer walking along a building wall / Bridgeman Images

AVE6322171: 1940s: Boats and fishing vessels drift in the harbor at sunset / Bridgeman Images

AVE6322180: 1980s: People set up the wiring and controls in a flight simulator / Bridgeman Images

AVE6322183: USA, 1950s: Animation of molecules leaving cells and entering blood stream in process of respiration and metabolism / Bridgeman Images

AVE6322192: 1980s: Computerized airplane landing display, compared to images of the actual runway and pilot's view / Bridgeman Images

AVE6322195: USA, 1950s: Patient on a respirator / Bridgeman Images

AVE6322204: 1980s: Small aircraft parked at an airport / Bridgeman Images

AVE6322219: USA, 1950s: Two white rats of different sizes / Bridgeman Images