AVE8894806: 1960s: Man and boy knock on door. Man opens doors. Man and boy enter cabin. / Bridgeman Images

AVE8894810: 1960s: Portrait of a bearded 17th Century man in armour but without helmet. / Bridgeman Images

AVE8894811: 1960s: Men walk through barnyard. / Bridgeman Images

AVE8894831: 1960s: Man pours buckshot into rifle. / Bridgeman Images

AVE8894338: 1960s: Turtles climbing through the grass to the water. / Bridgeman Images

AVE8894346: 1950s: Teen boys play football on field near high school. / Bridgeman Images

AVE8894348: 1960s: Curve-billed thrasher bird eating out of holes in cacti branch. / Bridgeman Images

AVE8894350: 1960s: A large bird standing behind a bush on the riverbank. / Bridgeman Images

AVE8894353: 1950s: Teen boy punts football on high school field. / Bridgeman Images

AVE8894359: 1950s: Men point to stools and talk in outdoor market in Morocco. / Bridgeman Images

AVE8894365: 1960s: Cattle and calves in a field. / Bridgeman Images

AVE8894367: 1950s: Family in historical Roman clothing talk and look at painted urn. / Bridgeman Images

AVE8894369: 1960s: Pocket gopher crawls around on rocks. / Bridgeman Images

AVE8894371: 1950s: Men and boy in historical Roman clothing talk near boat on beach. Man works on boat while friends walk away. / Bridgeman Images

AVE8894376: 1960s: Coyote trots on desert trail. / Bridgeman Images

AVE8894378: 1950s: African family watches as elder dons feathered head dress in village. / Bridgeman Images

AVE8894388: 1950s: Slate-roofed lodge sits in mountain valley. / Bridgeman Images

AVE8894390: 1960s: Bumblebee crawls on fluffy pink flower, covered in pollen. / Bridgeman Images

AVE8894395: 1960s: Fungi growing on tree trunk. / Bridgeman Images

AVE8894401: 1950s: Boys fly kite in neighbourhood park. / Bridgeman Images

AVE8894404: 1950s: Inuit family moves furnishing from igloo. / Bridgeman Images

AVE8894405: 1960s: Detritus on top of water moves with wavelets. / Bridgeman Images

AVE8894409: 1960s: Sign in front of stream: Polluted stream - Avoid All Contact. / Bridgeman Images

AVE8894413: 1950s: Portrait of Sir Thomas More hangs on display. / Bridgeman Images

AVE8894420: 1960s: Tall leafy green tree. / Bridgeman Images

AVE8894422: 1950s: Paintings and sculptures stand on display in museum gallery. / Bridgeman Images

AVE8894433: 1960s: Tall trees next to lake with sandy beach. / Bridgeman Images

AVE8894434: 1950s: Portrait paintings and furniture stand on display in museum galleries. / Bridgeman Images

AVE8894438: 1950s: Dump trucks drive past buildings in mine quarry. / Bridgeman Images

AVE8894443: 1960s: Native American man in braids with red feathered headdress. / Bridgeman Images

AVE8894444: 1950s: Monarch butterfly spread wings on flowers in garden. / Bridgeman Images

AVE8894451: 1960s: Four Native American men sit cross-legged and cross-armed under covering. / Bridgeman Images

AVE8894462: 1950s: Families in pilgrim costumes walk into gate of wooden fort. / Bridgeman Images

AVE8894482: Panama 1960s: Man hacks at brush with a machete while a woman holds a baby in front of a thatch roof hut. / Bridgeman Images

AVE8894483: 1960s: Man talks to a captain as woman cross a gangplank onto a riverboat. / Bridgeman Images

AVE8894496: 1960s: Horseshoe in a blacksmith's fire. He picks up the tongs. / Bridgeman Images