Feature

  1. Chemistry

    Burned by Flame Retardants?

    One particular class of flame retardants—polybrominated diphenyl ethers—is accumulating at alarming rates in the environment, taints human breast milk, and has toxic effects similar to the now-banned PCBs.

    By Charlotte Schubert

  2. Special Sleep Issue : PDF Download page

    All files are saved as PDFs.  Please download Adobe’s Acrobat Reader to view these files. Sleep Special : Complete PackageHigh Quality (17MB) | Low Quality (2MB) The Why of sleep (Tina Hesman Saey) / All Kinds of Tired (Susan Milius)High Quality (6.7MB) | Low Quality (1.1MB) Sleep gone awry (Laura Sanders)High Quality (2.5MB) | Low […]

    By Science News
  3. Astronomy

    A Cosmic Crisis?

    Astronomers appear to have a heavenly crisis on their hands, and it concerns material they can't even detect.