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• Past Issues

• 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
• This week's table of contents