News

  1. Neuroscience

    Mighty muscles may stave off depression

    Strong muscles protect the brain from stress-induced toxin associated with depression, a study in mice suggests.

    By Laura Sanders
  2. Life

    Fledgling birds change rules for caterpillar color

    An unusual experiment shows that larvae lose the advantage of warning colors during the seasonal flush of naïve predators.

    By Susan Milius
  3. Health & Medicine

    More than 1 million Ebola cases may hit West Africa by January

    New projections of the outbreak suggest that without drastic improvements, weekly cases could increase from hundreds to thousands.

    By Nathan Seppa and Janet Raloff
  4. Cosmology

    Gravitational wave discovery gives way to Milky Way dust

    New polarization maps from the Planck satellite suggest that the BICEP2 announcement this year of primordial gravitational waves might be due entirely to dust in our galaxy.