News

  1. Space

    New Hubble pictures suggest Milky Way fell together

    A preliminary analysis appears to strike a blow against the prevailing theory of galaxy formation.

    By Ron Cowen
  2. Health & Medicine

    U.S. childhood obesity rate continues to rise

    Only a few states buck the trend toward greater weight gain in kids age 10 to 17, a new survey shows.

    By Nathan Seppa
  3. Earth

    Gulf oil spill a slow-motion hurricane

    The accident’s timing could determine how badly it damages coastal marshes.

    By Janet Raloff
  4. Health & Medicine

    Epigenetic changes show up in people with PTSD

    Study finds alterations in genes tied to immune system and brain development, but whether they cause the disorder remains unclear.