Feature

  1. Clay Tells of Ice Age

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  2. Indian Mound Hides Graves

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  3. To Study Ancient Races

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  4. First Glances at New Books

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  5. Anniversaries of Science

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  6. “Hard Boiled” Bacteria

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  7. The Fly

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  8. Back Matter

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  9. Front Matter

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  10. Floating Islands for Transocean Air Routes

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  11. Growing Your Own Trees from Seeds

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  12. Jewels of the Darkness

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