AVE6324399: 1950s: A car pulls out of the driveway / Bridgeman Images

AVE6324527: Scientists Working in a Lab / Bridgeman Images

AVE6324536: White Rats Being Injected in Lab / Bridgeman Images

AVE6324551: Scientist Tests Protection of Clothing During Chemical Spraying in Field / Bridgeman Images

AVE6324602: 1910s: Adult woman and young girl walk down lineup of girls while questioning them / Bridgeman Images

AVE6324614: 1910s: Teacher kindly tucks schoolgirl into bed, closeup of boots, blanket, and pants laying on floor next to schoolboy’s bed / Bridgeman Images

AVE6324638: United States, 1950s: Doctor gives vaccination to child / Bridgeman Images

AVE6324647: United States, 1930s: Sound waves from a bell as hammer strikes it / Bridgeman Images

AVE6324520: Helicopter Spraying Pesticides on Trees and Bushes / Bridgeman Images

AVE6324526: Fruit Growing on a Tree / Bridgeman Images

AVE6324529: Man Undertakes Research with Test Tubes in Laboratory / Bridgeman Images

AVE6324541: Scientist Mixes up Poison for Experiment / Bridgeman Images

AVE6324547: Volunteer Takes Amount of Diluted Pesticide as Part of Test / Bridgeman Images

AVE6324568: Man with Pesticide Poisoning Froths at Mouth in Hospital Bed / Bridgeman Images

AVE6324571: Two Men with a Cow / Bridgeman Images

AVE6324619: 1910s: Schoolchildren run out of a burning building / Bridgeman Images

AVE6324634: 1910s: Man and woman greet each other on a porch / Bridgeman Images

AVE6324643: 1910s: A young couple sits together on a bench while the girl looks through a catalog / Bridgeman Images

AVE6324655: 1910s: Young couple watches a movie in a theater, they start to hold hands nervously / Bridgeman Images

AVE6324661: United States, 1930s: Picture of the middle ear, drum membrane, ear drum, and Eustachian tube / Bridgeman Images

AVE6324675: 1910s: Young woman worriedly looks through window at man lying on floor / Bridgeman Images

AVE6324687: 1910s: Movie screen shows man falling out of chair and crawling away, cuts to woman looking worried then walking off screen / Bridgeman Images

AVE6325322: MAN IN FANCY GOWN PERFORMS MAGIC TRICKS, 1940s / Bridgeman Images

AVE6325343: 1940s: Map of Europe with icons of people / Bridgeman Images

AVE6325421: United States, 1950s: High angle shot, basketball players on court throw balls, run / Bridgeman Images

AVE6325427: 1950s: Doctors operate on patient / Bridgeman Images

AVE6325455: United States, 1950s: Footage of basketball game / Bridgeman Images

AVE6325461: 1950s: Man feeds cows from buckets / Bridgeman Images

AVE6325470: 1950s: Girl draws / Bridgeman Images

AVE6324689: United States, 1930s: Animation of the transmission of sound waves from an external source, through to the cochlear and ossicles of the inner ear / Bridgeman Images

AVE6324692: United States, 1930s: Animated drawing showing the transmission of sound waves from the outside world into the inner ear / Bridgeman Images

AVE6324698: 1910s: Two men and two women speak in a parlor, then the men leave / Bridgeman Images

AVE6325321: Magic in the Living room, 1930s / Bridgeman Images

AVE6325353: 1940s: Poster of steamship / Bridgeman Images

AVE6325408: 1950s: Girl eats cookie / Bridgeman Images

AVE6325423: United States, 1950s: Slow motion footage of basketball game / Bridgeman Images