Great Barrier Reef, Queensland, Australia (© AWL Images/Danita Delimont)

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Gray wolf with begging pup, Montana (© Tim Fitzharris/Minden Pictures)

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Santa Cruz River, Patagonia, Argentina (© Coolbiere Photograph/Getty Images)

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Aerial view of Marley Beach, Bermuda (© Paul Zizka/plainpicture)

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The long plumes of a three-flowered avens as it goes to seed (© Sunshine Haven Photo/Shutterstock)

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Aerial view of Everglades National Park, Florida (© Tetra Images/Getty Images)

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Cheetah cubs climbing acacia trees in the Ngorongoro Conservation Area, Tanzania (© Paul Souders/Getty Images)

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