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  1. Physics

    New equation fits nitrogen to a T

    An elaborate, new equation that yields more accurate values for nitrogen's properties might have a multimillion-dollar impact in the cryogenic fluids industry.

    By Peter Weiss
  2. Physics

    Gecko toes tap intermolecular bonds

    For scurrying upside down on smooth ceilings and other gravity-defying feats, lizards known as geckos may exploit intermolecular forces between the surface and billions of tiny stalks under their toes.

    By Peter Weiss
  3. Health & Medicine

    Stress and sleepless nights

    Insomnia is associated with increases in stress hormones, boosts that persist all day and night.

    By Damaris Christensen
  4. Health & Medicine

    Gene causes body-fat disorder

    A gene linked to a form of muscular dystrophy also causes a disease that deposits fat unevenly after puberty.