Tulip fields, Netherlands, Europe

Uig Beach with patterns in the foreground created by wind blowing the sand, Isle of Lewis, Outer Hebrides, Scotland, United Kingdom, Europe

Detail of fresco of Pope Urban VI in Santa Maria della Croce church, Casarano, Lecce, Apulia, Italy, Europe

View over the Victorian Alps mountain range, Victoria, Australia, Pacific

Paraglider on Niederbauen Mountain, Lake Lucerne, Canton Uri, Switzerland, Europe

Waves of turquoise clear sea crashing on white sand of Triopetra beach, Plakias, Crete island, Greek Islands, Greece, Europe

Millennium Bridge, Thames River and St. Pauls Cathedral, London, England, United Kingdom, Europe

A view of Funchal and the harbour, Madeira, Portugal, Atlantic, Europe

A herd of African bush elephants (Loxodonta africana), Tarangire National Park, Tanzania, East Africa, Africa

Cenote Oxmal, Valladolid, Yucatan, Mexico, North America

Washing lines hanging across the street, Castello Quarter, Venice, Veneto, Italy, Europe

Leopard (Panthera pardus) in heavy brush, Kruger National Park, South Africa, Africa

African skimmers (Rynchops flavirostris) in flight over Lake Gipe, Tsavo, Kenya, East Africa, Africa

Lime being added to indigo paste, Guizhou, China, Asia

Colaba fishing fleet lands its catch in Back Bay, southern end of Mumbai city, Maharashtra, India, Asia

Brooklands Race Track in Surrey, UK

Fields and farms on the northeast edge of Dartmoor looking towards Chagford, Devon, England, United Kingdom, Europe

Sculpture by Francisco Martinez and Cathedral, Puntarenas City, Costa Rica, Central America

South Rim, Grand Canyon, UNESCO World Heritage Site, Arizona, United States of America, North America

Portovenere, Riviera di Levante, Liguria, Italy, Europe

Man dressed in Samurai costume at Jidai Matsuri Festival held annually in November at Sensoji Temple, Asakusa, Tokyo, Japan, Asia

India - faces: christian woman of kerala

A female Mallard with her newly hatched chicks on Walney Island, Cumbria, England, United Kingdom, Europe

A young polar bear (Ursus maritimus), scavenging a polar bear carcass on multi-year ice floes in the Barents Sea, Edge Island, Svalbard Archipelago, Norway

Attractive woman practicing yoga in Ibiza

Ebola virus particles (blue) found both as extracellular particles and budding particles from chronically infected African green monkey kidney cells. Image captured and color-enhanced at the NIAID Integrated Research Facility in Ft. Detrick, Maryland.

Park in Autumn, Portland, Oregon, United States of America

grey reef shark grey reef shark swimming over coral reef portrait side view (Carcharhinus amblyrhynchos)

USA, Utah, Lehi, Foal lying on grass