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Photo: Zebra stripes
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Photo: Close-up of a map puffer fish's eye
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Photo: A close view of bright bird feathers
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Photo: A close view of the side of an Arctic char fish
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Photo: Boa constrictor scales
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Photo: Hibiscus flower petals
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Photo: A close view of a green leaf
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Photo: The veins on a castor bean leaf
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Photo: Ceiling of an ice cave in Bavaria, Germany
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Photo: Cracked Arctic sea ice in Russia
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Photo: Sectored plate snowflake
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Photo: A millipede curled into a spiral
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Photo: Close-up of a basket sea star
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Photo: New Mexico sand dunes