AVE8900247: 1960s: Illustration of prehistoric elephants. / Bridgeman Images

AVE8900253: 1960s: Model of prehistoric horses. / Bridgeman Images

AVE8900270: 1960s: Fossilized mammoth skeleton. / Bridgeman Images

AVE8900282: 1960s: Close up, dinosaur fossil in rock. / Bridgeman Images

AVE8900289: 1960s: Weasel pacing in cage. / Bridgeman Images

AVE8900298: 1960s: Puppy chewing on bone, runs to dog digging in yard. / Bridgeman Images

AVE8900300: 1960s: Dog eating on porch. / Bridgeman Images

AVE8900302: 1960s: Close up of flower, hand touches flower. / Bridgeman Images

AVE8900307: 1960s: People with camels and donkeys in desert. / Bridgeman Images

AVE8900308: 1960s: Wheels of cheese, hands open package, cut cheese. / Bridgeman Images

AVE8900309: 1960s: Wheels of cheese, hands open package, cut cheese. / Bridgeman Images

AVE8900314: 1960s: Wheels of cheese, hands open package, cut cheese. / Bridgeman Images

AVE8900316: 1960s: Side view of light, particles blowing in light beam. / Bridgeman Images

AVE8900323: 1960s: Long shot of factory, water tower, hands holds up ball on string in foreground. / Bridgeman Images

AVE8900324: 1960s: Close up of hand pounding gavel. / Bridgeman Images

AVE8900329: 1960s: View of trees by road, pan to hillside. / Bridgeman Images

AVE8900330: 1960s: Low angle of roof, moon at night. / Bridgeman Images

AVE8900335: 1960s: View of trees, pan across hill, tilt up to sky. / Bridgeman Images

AVE8900342: 1960s: Boy picks up binoculars, looks through binoculars. / Bridgeman Images

AVE8900343: 1960s: Cows grazing in field. / Bridgeman Images

AVE8900357: 1960s: Reception of high-school students. Girls serve cookies at long table and students take them on napkins with drinks. / Bridgeman Images

AVE8900358: 1960s: High-school couples file into room. Man in suit stands by door. / Bridgeman Images

AVE8900359: 1960s: High-school couples file into room. Man in suit stands by door shaking the boys’ hands. / Bridgeman Images

AVE8900362: 1960s: Reception of high-school students. Girls serve cookies at long table and students take them on napkins with drinks. / Bridgeman Images

AVE8900369: 1960s: A rocky mountain against the sky. / Bridgeman Images

AVE8900372: 1960s: A worker polishes a slab of rock with a power tool. / Bridgeman Images

AVE8900374: 1960s: Waves lap onto shore. / Bridgeman Images

AVE8900375: 1960s: Waves lap onto shore. / Bridgeman Images

AVE8900377: 1960s: Boats on the water. One boat has sails and moves quickly and the rest without sails drift. / Bridgeman Images

AVE8900379: 1960s: A flashing lighthouse at night. Person stands by water. / Bridgeman Images

AVE8900383: 1960s: A stone mansion. / Bridgeman Images

AVE8900384: 1960s: A man and son walk down dock at harbor, man pointing out sights. / Bridgeman Images

AVE8900385: 1960s: Boat drives through the water in harbor. / Bridgeman Images

AVE8900387: 1960s: Person pages through old book called “The Lady’s Book”. Book has designs and illustrations. / Bridgeman Images

AVE8900390: 1960s: Man in top hat reads Boston Theatre ad for the play “Hamlet”. Man takes off hat, smoothes hair, and puts on hat. / Bridgeman Images

AVE8900404: 1960s: Livestock. Hut. Man carries load of hay. People get off boat. / Bridgeman Images