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EarthEstrogen effects linger in male fish
Male fish can inappropriately make egg yolk protein, even when only intermittently exposed to water tainted with an estrogenic pollutant.
By Janet Raloff -
Yeast sex: Only for certain partners
Two studies independently confirm that Candida albicans, a strain of yeast long believed to be asexual, can sexually reproduce under certain conditions.
By Ruth Bennett -
Metal in diet harms Colorado birds
Cadmium, a metal naturally present in south-central Colorado, concentrates at deadly levels in willow plants, poisoning the ptarmigan that rely on the plant during winter months.
By Ruth Bennett -
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Health & MedicineWeight-loss pill carries risks
The drug ephedra and its presumed active ingredient, ephedrine, provide only modest weight-loss effects and pose health risks.