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  1. Health & Medicine

    Genetics may underlie some kidney failure in blacks

    Gene variants that offer protection against African sleeping sickness may also put carriers at renal risk, a new study finds.

    By Nathan Seppa

  2. A violent tail

    The MESSENGER spacecraft finds powerful magnetic storms on Mercury, along with signs of surprisingly recent volcanic activity.

    By Ron Cowen
  3. Chemistry

    Smelling the menu

    Mouse breath triggers special cells in the nose that help send a safe-to-eat message.

    By Rachel Ehrenberg
  4. Health & Medicine

    Everyone poops his or her own viruses

    The viral denizens of a person’s intestines are unique and don’t change much over time, a study suggests.