News

  1. Life

    Undereducated immune cells get aggressive with HIV

    Scientists discover a mechanism that makes some people resistant to infection with the AIDS virus.

    By Tina Hesman Saey
  2. 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
  3. 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
  4. Earth

    Gulf oil spill a slow-motion hurricane

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