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  1. Chemistry

    Nitrogen Power: New crystal packs a lot of punch

    At extremely high temperatures and pressures, nitrogen gas assumes a three-dimensional crystal structure called polymeric nitrogen, a long-sought energy-storage material.

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  2. Groomed DNA Handles Threats: Mothering styles alter rats’ stress responses

    In rats, mothering styles set the genetic stage for a pup's lifelong responses to stressful situations.

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  3. 19444

    Might donating blood reduce blood concentrations of organochlorines, once the body has time to regenerate blood? Bill WallerDallas, Texas Researchers Catherine Pelletier and Angelo Tremblay of Laval University in Quebec City, Quebec, say this question is interesting but that the small quantity of donated blood wouldn’t significantly affect the overall concentration of organochlorines .—C.