News

  1. Health & Medicine

    Skeletal Discovery: Bone cells affect metabolism

    A protein made by bone cells has a surprising influence on energy metabolism, and could have a role in treating diabetes.

    By Patrick Barry
  2. Health & Medicine

    Serotonin lower in shift workers

    Workers who rotate between day and night shifts have less of the brain chemical serotonin than day shift workers do.

    By Brian Vastag
  3. Earth

    Beware summer radon-test results

    Measuring household radon levels in summer may give misleadingly low results.

    By Janet Raloff
  4. Astronomy

    Veiled black holes

    Many X ray sources in the sky could be active galactic nuclei smothered by gas and dust that blocks their emission of visible and ultraviolet light.