News
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EarthContraceptive ring could pose risks after its disposal
Discarded vaginal contraceptive rings could interfere with fishes' reproduction by releasing estrogen into streams.
By Janet Raloff -
EarthSnow alga may be sizable carbon sink
A common microorganism that adds a reddish tinge to some patches of snow may be a significant consumer of planet-warming carbon dioxide.
By Sid Perkins -
Health & MedicineBlood-Clot Surprise: Finding might explain a danger of Viagra
An amendment to the blood-clotting pathway might link Viagra to heart attacks in some users.
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AstronomyDistant and Strange: Orb isn’t just another extrasolar planet
A novel search technique that could ultimately find Earthlike worlds has uncovered an extrasolar planet that is 30 times farther away than any other planet detected and lies closer to its parent star than does any other orb discovered to date.