Uncategorized

  1. Math

    Knotty Calculations

    An alternative approach to quantum computing takes advantage of space-time knots and braids.

    By Erica Klarreich

  2. Mining the Mouse

    Recent analyses of the mouse genome illuminate human health and evolution.

    By John Travis

  3. 19034

    Phthalates have been subject to significant regulatory scrutiny by governmental agencies. Centers for Disease Control and Prevention data show exposure levels well within the safety levels established by federal regulators. Further, a growing body of evidence indicates that studies using rodents may not be relevant to humans. Marian K. StanleyAmerican Chemical CouncilArlington, Va.

    By Science News
  4. Earth

    Proof of Burden

    Two teams of scientists report that the blood and urine of most Americans contain toxic cocktails of metals, artificial hormones, and chemical ingredients of plastics, flame retardants, pesticides, herbicides, and disinfectants.