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  2. Mars’ Canals Not Man-Made

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  3. Building and Flying Model Airplanes: Making the Power Plant

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  4. A Wineglassful of Brains

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  5. Children’s Work at the Brooklyn Botanic Garden

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  7. Nature Coordination

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  8. Nature Ramblings: Two Curious Plants

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  10. Heat from Heart Beat

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  11. Rubber for United States?

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  12. Mental Disease in Children

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