Seymour Simon

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Muscles: Our Muscular System

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Neptune

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New Questions and Answers About Dinosaurs

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Now You See It, Now You Don't: The Amazing World of …

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Oceans

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Oceans (Smithsonian)

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Our solar system

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Out of Sight : Pictures of Hidden Worlds

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Penguins (Smithsonian)

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Pets in a Jar: Collecting and Caring for Small Wild …