Feature

  1. New Ideas and Gadgets

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  2. Current Patents

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  3. Back Matter

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  4. Front Matter

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  5. Sources Conflict

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  6. Colorado Dam

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  7. Nature Note

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  8. Electric Cars

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  9. Kind Words

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  10. A Word of Praise…

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  11. … and Another

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  12. Drifting Theories Shake up Geology

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