News
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AstronomyCosmic Couple: One galaxy, two gravitational beasts
Astronomers welcomed the discovery of two black holes in one galaxy, which confirms some ideas about how galaxies and black holes merge and evolve.
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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.