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  1. Health & Medicine

    Arctic Sneeze: Greenlanders’ allergies are increasing

    Allergies in Greenland nearly doubled from 1987 to 1998.

    By John Pickrell
  2. Chemistry

    Wine Tasting: Instrument can sniff out vinegar in sealed wine

    A new system could determine whether a sealed bottle of wine has turned to vinegar.

    By Jessica Gorman

  3. Chimp Change: Did an HIV-like virus ravage early chimps?

    Modern chimpanzees may be the offspring of survivors of an HIV-like pandemic that took place 2 million years ago.

    By Kristin Cobb
  4. Physics

    Bitty Beacon: Wee disks probe materials at microscales

    Illuminated by lasers, disks no larger than red blood cells can project rotating beams bright enough to create a light show in a darkened room.