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Health & MedicineShots often don’t reach muscle
Standard 3-centimeter needles are too short to penetrate the layer of fat in the buttocks of most women and most obese men, so injected medications aimed at muscle often don't reach their targets.
By Ben Harder -
Health & MedicineNew software aids virtual colonoscopy
A computer program helps radiologists spot dangerous growths in the colon without probing inside the body.
By Ben Harder -
AstronomyDark shadows
New radio telescope images of the center of the Milky Way make an even more compelling case that a supermassive black hole resides there.
By Ron Cowen -
EarthMicrobe polishes off pollutant
Researchers have determined how long a pesticide residue would remain in the environment if the microbe Pseudomonas pavonaceae didn't metabolize it.