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  1. Tech

    Digital Cells

    Researchers are gearing up to create cells with computer programs hardwired into the DNA.

    By Erica Klarreich
  2. Animals

    Fishy Paternity Defense: Bluegill dads: Not mine? Why bother?

    Bluegill sunfish have provided an unusually tidy test of the much-discussed prediction that animal dads' diligence in child care depends on how certain they are that the offspring really are their own.

    By Susan Milius

  3. 19234

    In your article, the possibility is mentioned that patients with Parkinson’s disease might have improved in the study because of the placebo effect rather than the administration of the protein glial-cell-line-derived neurotrophic factor. The article then says, “However, brain scans of these patients .