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  1. Placebo gives brain emotional break

    Placebo-instigated anxiety reduction is accompanied by sparse activity in emotional parts of the brain as well as by intense responses in neural structures that dampen pain, a new brain-scan study finds.

    By Bruce Bower
  2. Tech

    Sensor measures mass of one DNA molecule

    A new biosensor that can detect the mass of a single DNA molecule could lead to faster and more accurate screening for HIV infection, cancer, and other diseases.

    By Alexandra Goho
  3. Earth

    Antarctica’s gaining ice in some spots

    Large portions of Antarctica are storing more snowfall than they once did.

    By Sid Perkins
  4. Astronomy

    Panning Distant Dust

    Astronomers are using hundreds of newly detected debris disks found around a variety of nearby stars to hunt for planets and learn about the evolution of our solar system.