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  1. Dog personality: His master’s traits

    Personality traits may vary as much from one dog to another as they do from one person to another, a new study suggests.

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  2. Materials Science

    Nanowires grow on viral templates

    Researchers are using viruses to assemble semiconducting nanowires—the building blocks of future electronic circuits.

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  3. Physics

    Light pulse hovers in atom capsule

    A new way to freeze light pulses in midflight preserves the pulses' optical energy and may eventually lead to using stationary light in optical circuits and quantum computers.

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  4. Human genes take evolutionary turns

    Researchers have identified a set of genes that has evolved an extensive pattern of alterations unique to people.

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  5. Earth

    This pollutant fights lupus

    A hormone-mimicking pollutant that leaches out of some plastics appears to fight lupus.

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  6. Health & Medicine

    Could refrigeration explain Crohn’s rise?

    Crohn's disease, marked by inflammation of the small intestine, could be caused by refrigeration of meats, a process that selects for hardy bacteria that handle cold temperatures well, researchers hypothesize.

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  7. Tech

    Electronic skin senses touch

    A pressure-detecting membrane laminated onto a sheet of flexible plastic electronics may lead to artificial skin for robots.

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  8. 19293

    I’m sure the new therapies, including drug therapy, outlined in this article will greatly help many people. I was unhappy, however, to see that the drug D-cycloserine was going to be used to help people overcome their fear of public speaking. I had a great fear of public speaking, but 1 year in the club […]

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  9. Fear Not

    Scientists find that facing your fears enables you to suppress them.

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  10. 19292

    I thought that the X and Y chromosomes determined gender in animals, but I see no mention of them in your article. Does this mean that on a genetic basis, males and females in these organisms are identical? Neil H. MurphyWalnut Creek, Calif. In a sense, yes, says Philip Hastings of the Scripps Oceanographic Institute […]

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  11. When to Change Sex

    A research team contends that animals that routinely change sex, even those prompted by mate loss or other social cues, tend to do so when they reach 72 percent of their maximum size.

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  12. Math

    Splitting Terrorist Cells

    How can you tell if enough members of a terrorist cell have been captured or killed so there’s a high probability that the cell can no longer carry out an attack? A mathematical model of terrorist organizations might provide some clues. The question is what sort of mathematical model would work best. In this hypothetical […]

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