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  1. Humans

    Letters from the September 9, 2006, issue of Science News

    Brother bother If having biological older brothers correlates to homosexuality (“Gay Males’ Sibling Link: Men’s homosexuality tied to having older brothers,” SN: 7/1/06, p. 3), then we would expect that in the past, when families were larger, there would be a greater proportion of homosexuals. Is there any evidence for this? Rick NorwoodMountain Home, Tenn. […]

    By Science News
  2. Earth

    Plastics agent worsens skin allergies

    Low doses of one of the most commonly used softeners in plastics can aggravate dust-mite allergy.

    By Janet Raloff

  3. Sleep disorder tied to brain ills in kids

    Researchers have linked a severe form of sleep apnea in children to brain irregularities that may contribute to learning problems.