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Silk: Mimicking how spiders make their complex array of silks could usher in a tapestry of new materials, and other animals or plants could be designed to be the producers
Itch: Scientists trace a new path behind the maddening, unrelenting, screaming desire to scratch
Half-life (more or less): Physicists are stirred by claims that the sun may change what’s unchangeable—the rate of radioactive decay
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EARLY TB

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EARLY TUBERCULOSIS. DNA evidence of human tuberculosis from these 9,000-year-old bones of a woman and an infant suggests the disease appeared in humans much earlier than thought. Full story.Credit: credit: I. Hershkovitz

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