Group of juvenile barn swallows, Wales, UK (@ David Slater/Aurora Photos)

Group of juvenile barn swallows, Wales, UK (@ David Slater/Aurora Photos)

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Summer poppies at sunset (@ Anthony Spencer/Getty Images)

Summer poppies at sunset (@ Anthony Spencer/Getty Images)

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Wild piglets in Schleswig-Holstein, Germany (@ Gerhard Schulz/age fotostock)

Wild piglets in Schleswig-Holstein, Germany (@ Gerhard Schulz/age fotostock)

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The ceiling of Southwark Cathedral in London, England (@ Loop Images/Superstock)

The ceiling of Southwark Cathedral in London, England (@ Loop Images/Superstock)

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Nevada Solar One at sunrise in the Mojave Desert near Boulder City, California, U.S.A. (@ David Nunuk/Corbis)

Nevada Solar One at sunrise in the Mojave Desert near Boulder City, California, U.S.A. (@ David Nunuk/Corbis)

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The Space Needle and its reflection on the surface of the EMP Museum in Seattle, Washington, U.S.A. (@ Lonnye Bower)

The Space Needle and its reflection on the surface of the EMP Museum in Seattle, Washington, U.S.A. (@ Lonnye Bower)

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Green sea turtle hatchlings at Boatswain's Bay, Grand Cayman Island (@ Stephen Frink/Corbis)

Green sea turtle hatchlings at Boatswain's Bay, Grand Cayman Island (@ Stephen Frink/Corbis)

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Nā Pali Coast of Kauai, Hawaii, U.S.A. (@ Frans Lanting/Corbis)

Nā Pali Coast of Kauai, Hawaii, U.S.A. (@ Frans Lanting/Corbis)

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Cotton-top or Pinché tamarin of northern Colombia (@ Thomas Marent/Corbis)

Cotton-top or Pinché tamarin of northern Colombia (@ Thomas Marent/Corbis)

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Opuntia, prickly pear cactus (@ Flowerphotos/Superstock)

Opuntia, prickly pear cactus (@ Flowerphotos/Superstock)

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Flower farm in Lompoc, California, U.S.A. (@ Craig Aurness/Corbis)

Flower farm in Lompoc, California, U.S.A. (@ Craig Aurness/Corbis)

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An aerial view of the House of the Doves, Yucatán, Mexico (@ Kenneth Garrett/National Geographic/Getty Images)

An aerial view of the House of the Doves, Yucatán, Mexico (@ Kenneth Garrett/National Geographic/Getty Images)

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Creek flowing through rocks in the Porcupine Mountains, Ontonagon County, Michigan, U.S.A. (@ Ron Strong/Superstock)

Creek flowing through rocks in the Porcupine Mountains, Ontonagon County, Michigan, U.S.A. (@ Ron Strong/Superstock)

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Powdered pigments on display in Kathmandu, Nepal (@ Dinodia/age fotostock)

Powdered pigments on display in Kathmandu, Nepal (@ Dinodia/age fotostock)

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Photo composite of Earth rising above the lunar horizon (@ Corbis)

Photo composite of Earth rising above the lunar horizon (@ Corbis)

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Pathway of torii gates at Fushimi Inari Shrine in Kyoto, Japan (@ Rudy Sulgan/Corbis)

Pathway of torii gates at Fushimi Inari Shrine in Kyoto, Japan (@ Rudy Sulgan/Corbis)

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Orange-spotted pipefish in the Lembeh Strait of Sulawesi, Indonesia (@ Daniela Dirscherl/Getty Images)

Orange-spotted pipefish in the Lembeh Strait of Sulawesi, Indonesia (@ Daniela Dirscherl/Getty Images)

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Aerial view of the Bahama Banks, Bahamas (@ Jeremy Woodhouse/Getty Images)

Aerial view of the Bahama Banks, Bahamas (@ Jeremy Woodhouse/Getty Images)

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Three rabbits sitting on the grass (@ Image Source Ltd./Getty Images)

Three rabbits sitting on the grass (@ Image Source Ltd./Getty Images)

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Giant lobelia plant from Mt. Kilimanjaro, Tanzania (@ Oleg Bulanyy)

Giant lobelia plant from Mt. Kilimanjaro, Tanzania (@ Oleg Bulanyy)

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Texas bluebonnets on railroad tracks, Texas, U.S.A. (@ Jeremy Woodhouse/Corbis)

Texas bluebonnets on railroad tracks, Texas, U.S.A. (@ Jeremy Woodhouse/Corbis)

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Forth Rail Bridge, Queensferry, Edinburgh, Scotland (@ Christopher Belsten/Getty)

Forth Rail Bridge, Queensferry, Edinburgh, Scotland (@ Christopher Belsten/Getty)

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Death's head hawkmoth in Slovenia (@ Ziga Camernik/age fotostock)

Death's head hawkmoth in Slovenia (@ Ziga Camernik/age fotostock)

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Marigot forest, Dominica (@ SIME/eStock Photo)

Marigot forest, Dominica (@ SIME/eStock Photo)

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Willets in J. N. “Ding” Darling National Wildlife Refuge on Sanibel Island, Florida (@ Bill Gozansky/age fotostock)

Willets in J. N. “Ding” Darling National Wildlife Refuge on Sanibel Island, Florida (@ Bill Gozansky/age fotostock)

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Crowfoot Mountain reflected in Bow Lake in Banff National Park in Alberta, Canada (@ Daisy Gilardini/Getty Images)

Crowfoot Mountain reflected in Bow Lake in Banff National Park in Alberta, Canada (@ Daisy Gilardini/Getty Images)

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