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  1. Health & Medicine

    Second chicken pox shot boosts coverage

    Giving a follow-up vaccination increases coverage to more than 98 percent of kids who receive it, a study finds.

    By Nathan Seppa
  2. Health & Medicine

    How the brain shops

    Using implanted electrodes, researchers find individual neurons associated with attaching value to objects.

    By Laura Sanders
  3. Humans

    How to hear above the cocktail party din

    Simply repeating a sound in different acoustic environments may allow listeners to focus in on it, experiments suggest.

    By Alexandra Witze
  4. Life

    Robins reject red glowing grub

    Parasitic worms induce a color change in their caterpillar victims that's literally repulsive to predators.