News

  1. Health & Medicine

    Four-question test ID’s women with depression

    Simple decision tool shows potential as quick way to identify clinical depression.

    By Bruce Bower
  2. Physics

    Perfect mirror debuts

    Material that reflects light without letting any escape could improve lasers.

    By Andrew Grant
  3. Earth

    Every six years, Earth spins slightly faster and then slower

    Changes in day length linked to workings of Earth's core.

    By Cristy Gelling
  4. Planetary Science

    Gas, not planets, may be source of rings around stars

    Interactions between gas and dust may form elliptical patterns.

    By Jessica Shugart
  5. Life

    Bacterial molecules may prevent inflammatory bowel disease

    Common compounds produced by gut microbes quench colitis in mice.