Uncategorized

  1. Humans

    Racial IQ Gap Narrows: Blacks gain 4 to 7 points on whites

    African Americans reduced the racial gap on IQ-test scores by about one-third between 1972 and 2002.

    By Eric Jaffe

  2. 19715

    I suspect the findings in this article might be correlated with the reduction in lead exposure over the same timeframe. I wonder if the greater reduction in early-childhood blood lead for blacks might be sufficient to explain the effect described in the study. Richard B. MottRingoes, N.J. What can we conclude from these facts? Not […]

    By Science News
  3. Earth

    Stung Lung: Volatile chemical may cut respiratory capacity

    Para-dichlorobenzene, a chemical in some air fresheners and pest-control products, may slightly impair lung function in millions of people.