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AstronomyMature Before Their Time
Some galaxies were in place and forming stars at a prolific rate when the universe, now 13.7 billion years old, was just an 800-million-year-old whippersnapper.
By Ron Cowen -
PhysicsNew 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 -
PhysicsGecko 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 -
Health & MedicineStress and sleepless nights
Insomnia is associated with increases in stress hormones, boosts that persist all day and night.