Feature

  1. 1976 AA: Earth’s Primitive, Fast-Moving Neighbor

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  2. Biomedicine

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  3. How Bacterial Toxins Can Do You In

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  4. Front Matter

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  5. New Hydrogen Ion ($text{H}^{–}$) Discovered

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  6. Back Matter

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  7. Back Matter

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  8. Artificial Vision: A Quantum Leap Forward

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  9. Lingering Wastes

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  10. EEC Pollution Controls

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  11. After Nuclear War

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  12. Mars-Bound Vikings Reveal Cold Ovens

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