Feature

  1. Manic Depression: A New Gene Defect

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  2. Science & Society

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  3. AIDS Drug Approved, Vaccine Tested

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  4. Science on the Air

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  5. On the Trail of Elemental Matter

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  6. Back Matter

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  7. Earth Sciences

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  8. Spending More for Cleaner Coal

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  9. Physics

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  10. Superconductivity: A Physics Rush

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  11. Amassing Momentum for Mars

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  12. Rift Valley Fever: Long-Distance Diagnosis

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