Aurora borealis over Vee Lake near Yellowknife, Canada (@ Michael Ericsson/Getty Images)

Aurora borealis over Vee Lake near Yellowknife, Canada (@ Michael Ericsson/Getty Images)

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Marismas del Odiel Biosphere Reserve, Huelva Province, Andalusia, Spain (@ Martin Ruegner/Getty Images)

Marismas del Odiel Biosphere Reserve, Huelva Province, Andalusia, Spain (@ Martin Ruegner/Getty Images)

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Detail of a banana leaf, Mainau Island, Germany (@ Egon Bömsch /Age fotostock)

Detail of a banana leaf, Mainau Island, Germany (@ Egon Bömsch /Age fotostock)

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Interior of Marble Caves, General Carrera Lake, Chile (@ Danita Delimont/Gallo Images/Getty Images)

Interior of Marble Caves, General Carrera Lake, Chile (@ Danita Delimont/Gallo Images/Getty Images)

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Marjorie McNeely Conservatory at Como Park in St. Paul, Minnesota (@ Joe Mamer/Age fotostock)

Marjorie McNeely Conservatory at Como Park in St. Paul, Minnesota (@ Joe Mamer/Age fotostock)

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Stromatolites at dawn in Shark Bay, Western Australia (@ Frans Lanting/Corbis)

Stromatolites at dawn in Shark Bay, Western Australia (@ Frans Lanting/Corbis)

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Mantles of giant clams in Kingman Reef, Pacific Ocean (@ Brian J. Skerry/Getty Images)

Mantles of giant clams in Kingman Reef, Pacific Ocean (@ Brian J. Skerry/Getty Images)

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Columns in the Court of Amenophis III, Luxor Temple, Luxor, Egypt (@ Ian Cumming/Axiom)

Columns in the Court of Amenophis III, Luxor Temple, Luxor, Egypt (@ Ian Cumming/Axiom)

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Fireworks at Kek Lok Si Temple, Penang, Malaysia (@ Tan Lian Hock/Asia RM/Age footstock)

Fireworks at Kek Lok Si Temple, Penang, Malaysia (@ Tan Lian Hock/Asia RM/Age footstock)

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Umbrellas on a beach in Cape Town, South Africa (@ Roger Wright/Getty Images)

Umbrellas on a beach in Cape Town, South Africa (@ Roger Wright/Getty Images)

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Frosted bearberry (uva-ursi) bush on the tundra in the Yukon, Canada (@ Peter Van Rhijn/Corbis)

Frosted bearberry (uva-ursi) bush on the tundra in the Yukon, Canada (@ Peter Van Rhijn/Corbis)

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King Penguin colony on South Georgia Island (@ Frans Lanting/Corbis)

King Penguin colony on South Georgia Island (@ Frans Lanting/Corbis)

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Revelstoke Dam, British Columbia, Canada (@ Christopher Morris/Corbis)

Revelstoke Dam, British Columbia, Canada (@ Christopher Morris/Corbis)

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Commonwealth Place in Canberra, Australia (@ Richard I'Anson/Lonely Planet Images)

Commonwealth Place in Canberra, Australia (@ Richard I'Anson/Lonely Planet Images)

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Fishing village of Reine, in the Lofoten Islands, Norway (@ Frank Krahmer/Corbis)

Fishing village of Reine, in the Lofoten Islands, Norway (@ Frank Krahmer/Corbis)

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Bridge of Arts in Paris, France (@ Maurizio Rellini/SIME/4Corners)

Bridge of Arts in Paris, France (@ Maurizio Rellini/SIME/4Corners)

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Great Court roof, British Museum in London, England (@ D.V.A./age footstock)

Great Court roof, British Museum in London, England (@ D.V.A./age footstock)

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Reflection on Blue Lake, adjacent to St. Bathans, Central Otago, New Zealand (@ Colin Monteath/age footstock)

Reflection on Blue Lake, adjacent to St. Bathans, Central Otago, New Zealand (@ Colin Monteath/age footstock)

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People fishing at sunset in Kerala, India (@ Anders Blomqvist/Lonely Planet Images)

People fishing at sunset in Kerala, India (@ Anders Blomqvist/Lonely Planet Images)

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Great Horned Owl in Alberta, Canada (@ Wayne Lynch/Corbis)

Great Horned Owl in Alberta, Canada (@ Wayne Lynch/Corbis)

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Skeins of fabric hung out to dry in the dyers' souk, Marrakech, Morocco (@ Peter Adams Photography Ltd./Getty Images)

Skeins of fabric hung out to dry in the dyers' souk, Marrakech, Morocco (@ Peter Adams Photography Ltd./Getty Images)

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Encounter Restaurant in LAX International Airport, Los Angeles, California (@ Tom Paiva/Getty Images)

Encounter Restaurant in LAX International Airport, Los Angeles, California (@ Tom Paiva/Getty Images)

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Female green ringtail possum with a joey in her pouch, Queensland, Australia (@ Dave Watts/Visuals Unlimited, Inc.)

Female green ringtail possum with a joey in her pouch, Queensland, Australia (@ Dave Watts/Visuals Unlimited, Inc.)

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Sunrise over the walls of the Forbidden City, Beijing, China (@ Travelasia/Asia Images/Getty Images)

Sunrise over the walls of the Forbidden City, Beijing, China (@ Travelasia/Asia Images/Getty Images)

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Unterfallengrundhof farmhouse through the morning mist near Gütenbach, Black Forest, Baden-Württemberg, Germany (@ PS Belenos/Huber/4Corners)

Unterfallengrundhof farmhouse through the morning mist near Gütenbach, Black Forest, Baden-Württemberg, Germany (@ PS Belenos/Huber/4Corners)

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Skier making turns on a ridge near Valdez, Alaska (@ Wink Inc./Footage Search)

Skier making turns on a ridge near Valdez, Alaska (@ Wink Inc./Footage Search)

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Green leaf mantis (@ Norbert Wu/Corbis)

Green leaf mantis (@ Norbert Wu/Corbis)

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Ancient city of Bagan, Myanmar (@ Philippe Body/Hemis/Corbis)

Ancient city of Bagan, Myanmar (@ Philippe Body/Hemis/Corbis)

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Aerial view of a dock in Martinique, France (@ Guido Alberto Rossi/Axiom)

Aerial view of a dock in Martinique, France (@ Guido Alberto Rossi/Axiom)

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Painted backstreet of Dozza in the province of Bologna, Italy (@ SIME/eStock Photos)

Painted backstreet of Dozza in the province of Bologna, Italy (@ SIME/eStock Photos)

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Polar bear rolling on the frozen Beaufort Sea, near Point Barrow, Alaska (@ Patrick J. Endres/Visuals Unlimited)

Polar bear rolling on the frozen Beaufort Sea, near Point Barrow, Alaska (@ Patrick J. Endres/Visuals Unlimited)

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