Feature

  1. Astronomy

    All Aglow in the Early Universe

    Was the infant cosmos a star-making machine?

    By Ron Cowen
  2. Ecosystems

    Tadpole Science Gets Its Legs . . .

    The amazingly complex tadpole now shines in ecological studies.

    By Susan Milius

  3. Biological Dark Matter

    The discovery that some genes encode RNA strands instead of proteins has surprised biologists.

    By John Travis
  4. Materials Science

    Getting Out the Thorn

    Researchers are developing new ways to improve the compatibility of implantable biomaterials in the body.

    By Jessica Gorman
  5. Earth

    Hormones: Here’s the Beef

    Runoff of the hormones excreted by steroid-treated livestock could subtly harm aquatic life.