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  1. Physics

    Smallest laser minds the gap

    The smallest, most efficient laser yet represents a step toward speedier information transfer within computers.

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  2. Oldest siblings show slight IQ advantage

    The oldest boys in families, including those who became oldest after the death of an earlier-born brother, have a slight IQ edge over their younger siblings.

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  3. Enzyme is target in parasite

    The flatworm that causes the tropical disease schistosomiasis may be vulnerable to drugs that neutralize an essential enzyme in the parasite.

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  4. Physics

    Pas de deux for a three-scoop particle

    Physicists have discovered the first particle containing one member of each of the three families of quarks.