Feature

  1. Astronomy

    A Dark Force in the Universe

    Cosmologists are thinking dark thoughts about what kind of mystery force may be contorting the cosmos, pushing galaxies apart at a faster and faster rate.

    By Ron Cowen

  2. Gray Matters

    Once believed to be a supporting cast, the brain cells called astrocytes appear to play important roles in many brain scenarios.

    By Jessa Netting
  3. Health & Medicine

    Blood Relatives

    After decades of research, several companies are about to release the first line of artificial blood products.

    By Linda Wang
  4. Health & Medicine

    Breathing on the Edge

    Researchers are exploring how both sea-level lowlanders and high-altitude natives cope with low oxygen levels.