Uncategorized

  1. Health & Medicine

    Risky DNA: Autism studies yield fresh genetic leads

    Two new studies point to the diverse genetic roots of autism and related developmental disorders, while other evidence questions the claim that mercury-based childhood vaccines have contributed to rising autism rates.

    By Bruce Bower
  2. Math

    Small Infinity, Big Infinity

    A mathematician develops a new proof showing that infinity comes in different sizes.

    By Julie Rehmeyer
  3. Humans

    Letters from the January 12, 2008, issue of Science News

    Shades of meaning In “Going Coastal: Sea cave yields ancient signs of modern behavior” (SN: 10/20/07, p. 243), researcher Curtis Marean refers to Stone Age people using a reddish pigment for “body coloring or other symbolic acts.”