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Ruben F. Castro: optic fiber
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Ruben F. Castro: spiral
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Ruben F. Castro: Euro coin
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Ruben F. Castro: through the needle hole
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Ruben F. Castro: I have an eye for Macro...
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Ruben F. Castro: Flickr pill
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Ruben F. Castro: Seed
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Ruben F. Castro: Spider
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Ruben F. Castro: Spider 2
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Ruben F. Castro: Ant III
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Ruben F. Castro: Ant II
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Ruben F. Castro: Ant
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Ruben F. Castro: Fly
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Ruben F. Castro: Inside of a flower