News
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Health & MedicineViagra might rescue risky pregnancies
Viagra shows promise for limiting threats of fetal loss from preeclampsia, a type of high blood pressure that frequently occurs during pregnancy.
By Janet Raloff -
Blue light keeps night owls going
A study of nine young men suggests that blue light is more effective than yellow at beating back sleepiness and muting key physiological changes that normally occur in late evening.
By Ben Harder -
Planetary ScienceA moon with atmosphere
Magnetic measurements by the Cassini spacecraft have revealed that Saturn's moon Enceladus has a tenuous atmosphere containing water vapor.
By Ron Cowen -
EarthBlowflies shed mercury at maturity
Blowflies that absorb mercury from fish carcasses they feed on as larvae rid themselves of much of that toxic metal when they become adults.