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  1. Original Kin: Six-legged bugs may have evolved twice

    Insects may have evolved independently from other six-legged land bugs and may be more closely related to crustaceans than to their fellow so-called hexapods.

    By Ben Harder
  2. Astronomy

    Cosmic Afterglow: Gamma-ray bursts may one-up themselves

    New observations suggest that gamma-ray bursts may be even more energetic than scientists had estimated.

    By Ron Cowen

  3. Genetically Driven: Mutation shows up in binge eaters

    Overweight binge eaters are more likely to harbor a genetic mutation that disrupts brain signals governing satiety than are people of normal weight.

    By Nathan Seppa
  4. Physics

    Muon Manna? Particle shower may spotlight loose nukes

    Radiation from space may help border guards spot loose nukes stowed in shipping containers.