News
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Health & MedicineRaloxifene doesn’t hike breast density
Estrogen-replacement therapy that includes estrogen increases breast-tissue density among postmenopausal women, but the estrogen-replacement drug raloxifene doesn’t.
By Nathan Seppa -
Flood’s rising? Quick, start peeing!
Malaysian ants that nest in giant bamboo fight floods by sipping from water rising inside and then dashing outdoors to pee.
By Susan Milius -
Warblers make species in a ring
Genetic and song analyses of the greenish warblers in forests around the Tibetan Plateau suggest the birds represent a long-sought evolutionary quirk called a ring species.
By Susan Milius -
Brain takes emotional sides for sexes
Men's and women's brains may adopt different approaches to fostering memories of emotional experiences.