1350-4066 - The Douglas C-124 Globemaster II was the primary heavy-lift transport for the U.S. Air Force in the the 1950's and 1960's.

1350-4082 - The Douglas C-124 Globemaster II was the primary heavy-lift transport for the U.S. Air Force in the the 1950's and 1960's.

1350-4081 - The Douglas C-124 Globemaster II was the primary heavy-lift transport for the U.S. Air Force in the the 1950's and 1960's.

1350-4063 - The Douglas C-124 Globemaster II was the primary heavy-lift transport for the U.S. Air Force in the the 1950's and 1960's.

1116-52081 - Colourful blocks stacked into a tower and dispersed on the floor at playtime; Surrey, British Columbia, Canada

1116-50322 - Guanaco (Lama guanicoe) is the primary food source for the puma of Southern Chile; Torres del Paine, Chile

1116-47277 - Close-up of colourful macaroons all in a row in store showcase, Luxembourg City, Luxembourg

1116-47571 - Mileage Sign, Rio Lagartos, Yucatan, Mexico

1242-227 - Primary school classroom full of students, Houy Mieng village, Laos, Indochina, Southeast Asia, Asia

1242-230 - Primary school classroom full of students, Houy Mieng village, Laos, Indochina, Southeast Asia, Asia

1270-148 - A classroom full of students learning at a primary school in Ghana, West Africa, Africa

1270-151 - A male teacher teaching a classroom of children at a primary school in Ghana, West Africa, Africa

1270-150 - A female teacher teaching science to a classroom of students at a primary school, Ghana, West Africa, Africa

1270-149 - A female teacher teaching at the front of the classroom at a primary school in Ghana, West Africa, Africa

1270-152 - A female teacher teaching science to a classroom of students at a primary school, Ghana, West Africa, Africa

1270-154 - A school boy playing music on a large wooden xylophone at his primary school in Ghana, Africa

1211-33 - Primary school, Pong Teuk, Cambodia, Indochina, Southeast Asia, Asia

1211-44 - Primary school, Pong Teuk, Cambodia, Indochina, Southeast Asia, Asia

1211-41 - Primary school, Pong Teuk, Cambodia, Indochina, Southeast Asia, Asia

1211-28 - Primary school, Pong Teuk, Cambodia, Indochina, Southeast Asia, Asia

1211-24 - Primary school, Pong Teuk, Cambodia, Indochina, Southeast Asia, Asia

1211-29 - Primary school, Pong Teuk, Cambodia, Indochina, Southeast Asia, Asia

1211-39 - Primary school, Pong Teuk, Cambodia, Indochina, Southeast Asia, Asia

1211-42 - Primary school, Pong Teuk, Cambodia, Indochina, Southeast Asia, Asia

1211-14 - Primary school, Pong Teuk, Cambodia, Indochina, Southeast Asia, Asia

1211-8 - Primary school, Pong Teuk, Cambodia, Indochina, Southeast Asia, Asia

1211-11 - Volunteer Primary Cluster Teacher trainer, Fiona Stevenson leading story time and singing in the yard of primary school in Fori, next to trainee Alpha Ajallow, The Gambia, West Africa, Africa

1211-36 - Primary school, Pong Teuk, Cambodia, Indochina, Southeast Asia, Asia

1211-43 - Primary school, Pong Teuk, Cambodia, Indochina, Southeast Asia, Asia

1211-40 - Primary school, Pong Teuk, Cambodia, Indochina, Southeast Asia, Asia

1211-56 - Young girl completing a gap filling exercise on a chalkboard at Malasang Primary School, Buka, Bougainville, Papua New Guinea, Pacific

1211-38 - Primary school, Pong Teuk, Cambodia, Indochina, Southeast Asia, Asia

1211-34 - Primary school, Pong Teuk, Cambodia, Indochina, Southeast Asia, Asia

1211-35 - Primary school, Pong Teuk, Cambodia, Indochina, Southeast Asia, Asia

1211-37 - Primary school, Pong Teuk, Cambodia, Indochina, Southeast Asia, Asia

1211-45 - Primary school of the Leparua people, providing education as well as medication, Kenya, East Africa, Africa

1211-31 - Primary school, Pong Teuk, Cambodia, Indochina, Southeast Asia, Asia

1211-32 - Primary school, Pong Teuk, Cambodia, Indochina, Southeast Asia, Asia

1211-15 - Primary school playtime, Ndop District, Cameroon, Africa

1211-2 - Teacher, Walewale DA Primary Walewale, West Mamprusi District, Ghana, West Africa, Africa

1211-10 - Teacher Musa Manjang, Balaba Primary School, The Gambia, West Africa, Africa

858-20 - Children are study at morning in the orphanage cum primary school, Bandarban, Bangladesh

465-3171 - Mature male orangutan at Semenggoh Orangutan Rehabilitation Centre, 740 hectares of primary forest near Kuching in Sarawak, Borneo, Malaysia, Southeast Asia, Asia

465-3165 - Liana and vine shrouded dipterocarp tree in primary rainforest in the Maliau Basin Conservation Area, Sabah, Borneo, Malaysia, Southeast Asia, Asia

465-3168 - Mist rises from primary rainforest at dawn, Maliau Basin Conservation Area, Sabah, Borneo, Malaysia, Southeast Asia, Asia

465-3166 - Tall dipterocarp trees in primary rainforest in the Maliau Basin Conservation Area, Sabah, Borneo, Malaysia, Southeast Asia, Asia

465-3167 - Mist rises from primary rainforest at dawn, Maliau Basin Conservation Area, Sabah, Borneo, Malaysia, Southeast Asia, Asia

465-3169 - Mist rises from primary rainforest at dawn, Maliau Basin Conservation Area, Sabah, Borneo, Malaysia, Southeast Asia, Asia

1161-6136 - Fishermen's pallets at San Vicente de la Barquera, maritime town in Cantabria, Northern Spain

1161-6135 - Fishermen's pallets at San Vicente de la Barquera, maritime town in Cantabria, Northern Spain

1161-3384 - Boys at primary school in Hong Ying Road, Xian. China has a one child policy to reduce population.

1161-559 - A cigarette between the lips matches the bone through his nose for this man at a Sing Sing tribal gathering in Papua New Guinea

1161-846 - Courtier at the Sultan's Palace,Yogyakarta, Indonesia wearing a pointed hat and bright red uniform

832-15863 - Rainbow

749-963 - Plaza Independencia, the main city square, Mendoza, Argentina, South America

733-3271 - The main reading room at The National Library, Beijing, China, Asia

733-3270 - The main reading room at The National Library, Beijing, China, Asia

749-948 - The main staircase at the Winter Palace. St. Petersburg, Russia, Europe

29-4934 - Detail of the main spire with some of the 646 erotic figures carved in sandstone on the Kandariya Mahadeva Temple, largest of the Chandela temples, within Western Group, Khajuraho, UNESCO World Heritage Site, Madhya Pradesh state, India, Asia

794-645 - Annual Independence Day, people walking along the main Khreshchatyk Street, Kiev, Ukraine, Europe

641-10870 - Dome inside Iglesia San Pedro, the main church at Mineral de Pozos (Pozos), a UNESCO World Heritage Site, Guanajuato State, Mexico, North America

641-10790 - Dome inside Iglesia San Pedro, the main church at Mineral de Pozos (Pozos), a UNESCO World Heritage Site, Guanajuato State, Mexico, North America

794-375 - Architecture on the main commercial street, Paseo Ahumada, Santiago Centro, Santiago, Chile, South America

197-4894 - The main port of Mindelo on the island of Sao Vicente, Cape Verde Islands

357-1765 - A small group of people trekking through primary rainforest, Gunung Mulu National Park, Sarawak, island of Borneo, Malaysia, Asia

450-3901 - Portrait of an Uzbek woman with gold teeth in the main food market, Samarkand, Uzbekistan, Central Asia, Asia

620-467 - Striped woven rugs in vibrant primary colours for sale in Mexico, North America

391-6023 - Main theatre, 1st century AD, carved into the solid rock, hellenistic style, Petra, Jordan, Middle East

465-900 - The main Chinese temple in Kota Kinabalu, Sabah, island of Borneo, Malaysia, Asia

753-138 - Cathedral in main Plaza de Armas, San Cristobal de las Casas, Mexico, North America

391-6143 - Tetrapylon on Graeco-Roman columned main street, 1st century AD, Palmyra, Syria, Middle East

83-8763 - Chinese temple in Sibu, main port city on the Rejang River, Sarawak, island of Borneo, Malaysia, Asia

252-3886 - Main dive site in Belize, Ambergris Caye, Belize, Central America

252-2037 - Close-up of painted eye on side of fishing boat, island of Bali, Indonesia, Southeast Asia, Asia

620-268 - A man selling striped woven blankets or rugs in vibrant primary colours on the beach at Puerto Vallarta, Mexico, North America

627-72 - Exterior of a row of beach huts painted in bright primary colours, Brighton Beach, near Melbourne, Victoria, Australia, Pacific

357-1287 - Three wheeled vehicles on main road, Mingora, Swat valley, North West Frontier Province, Pakistan, Asia

557-2884 - Pah Oh minority children in local village school, Pattap Poap near Inle Lake, Shan State, Myanmar (Burma), Asia

83-8854 - Market, Barastagi, main town in the Karo Highlands, North Sumatra, Sumatra, Indonesia, Southeast Asia, Asia

306-1223 - Red modern sculpture, NCNB Plaza, Dallas, Texas, United States of America (USA), North America

739-474 - Wurzburg, Bavaria, Germany, Europe

640-2710 - Primary school, Bangkok, Thailand, Southeast Asia, Asia

739-473 - Bridge over the River Main, Wurzburg, Bavaria, Germany, Europe