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  1. Health & Medicine

    Treat HIV-positive babies from the start

    Babies who are born infected with HIV from their mothers should be treated for the virus as soon as possible, even before symptoms begin, a study finds.

    By Nathan Seppa
  2. Health & Medicine

    Minus one gene, male mouse is Mr. Mom

    The last day of the Society for Neuroscience annual meeting offers new ideas on gender-based behavior, the genetics of creativity, the brain power of motherhood and the non-randomness of blinking.

    By Science News
  3. Physics

    Superconductivity does the twist

    Electron fluctuations could explain why exotic material conducts without resistance.

    By Patrick Barry
  4. Life

    Mammoth genome approaching completion

    Genetic material extracted from the hair of woolly mammoths has revealed new information about the extinct creatures, including how closely related they are to modern elephants.