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  1. Physics

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  2. Single-File Electrons

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  3. Off the Beat: Bright Ideas That Still Shine

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  4. Books

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  5. Back Matter

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  6. Front Matter

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  7. Commentary: A Thank-You to Our Subscribers

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  8. Why the Southeast Is Sweltering

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  9. The Quake Gap: Waiting for Magnitude 7

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  10. New Look for an Old Dinosaur: Armor Plates All in a Row

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  11. Left Brain Reigns over Sign Language

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  12. Challenger’s Last Words

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