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In This Issue
- 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
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SOIL SAMPLE
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This microscopic image of Martian soil (red, lower image) collected by the robotic arm (pictured holding the soil) on Mars Phoenix Lander shows small clumps of fine, fluffy, red particles collected from a sample called Rosy Red.
Credit: JPL/NASA, U. of Arizona, Max Planck Institute
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