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  1. Not Like Clockwork: High-fat diet disrupts daily routines of mice

    Fatty diets disrupt the sleep and metabolic cycles of mice by changing the activity of genes.

    By Sarah Williams
  2. Agriculture

    Silencing Pests: Altered plants make RNA that keeps insects at bay

    Engineered plants make genetic material that disables critical genes in insects that eat the plants, offering a possible new strategy for agricultural-pest control.

    By Sarah Webb
  3. Astronomy

    Ray Tracing: Energetic cosmic rays linked to giant black holes

    New observations suggest that ultrahigh-energy cosmic rays originate in the cores of nearby galaxies harboring supermassive black holes.

    By Ron Cowen

  4. Smarty Gene: Breast-fed kids show DNA-aided IQ boost

    Breast-feeding substantially boosts children's intelligence, but only if the youngsters possess a specific version of a gene involved in processing mothers' milk.