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Health & MedicineHeart disease linked to clotting gene
African Americans with a mutation in a blood-clotting gene have a sixfold increase in the risk of heart disease, but this is not the case for white Americans with the same mutation.
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Health & MedicineStatins’ structure blocks cholesterol
X-ray crystallography shows that statins impede the build-up of cholesterol by physically blocking the binding site of an enzyme important for cholesterol production.
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EarthNations sign on to persistent-pollutants ban
The United States joined 126 other nations in signing a treaty to ban or phase out a dozen persistent and toxic pollutants.
By Janet Raloff -
EcosystemsParrot survey finds poaching but also hope
The largest review yet of wild parrot nesting finds poaching worrisomely frequent but also sees cause for hope in the efects of a U.S.