Feature

  1. A Most Powerful X-Ray Machine

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  2. Extinctions on Ice

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  3. Science on the Air

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  4. Environment

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  5. Seamount Serendipity in the South Pacific

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  6. Mathematics

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  7. Chemical Power for Visible-Light Lasers

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  8. A-Bomb Radiation Doses Reassessed

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  9. Front Matter

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  10. Biomedicine

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  11. Cold Cure, Prevention: Nothing to Sneeze At

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  12. Twists of Space

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