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EarthRural living may hobble sperm
An epidemiological study provides evidence that sperm concentrations in men residing in rural areas are significantly lower than those of men living in urban centers.
By Janet Raloff -
EarthArsenic Agriculture? Irrigation may worsen Bangladesh’s woes
Researchers investigating an unfolding massive epidemic of arsenic poisoning in Bangladesh say they have evidence that local irrigation practices may be contributing to the problem.
By Ben Harder -
PhysicsCold War Conductor: Ultracold plutonium compound shows no resistance
Researchers studying the crystalline properties of radioactive plutonium have discovered the first plutonium-based superconductor.
By Peter Weiss -
Dog Sense: Domestication gave canines innate insight into human gestures
Dogs may have acquired an innate ability to understand human body language after they were domesticated.