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  1. Humans

    Letters from the March 4, 2006, issue of Science News

    Impure thoughts Epidemiologist Scott Davis warns, “Melatonin supplements are not regulated” the way drugs are. … “There may be all kinds of impurities and contaminants” (“Bright Lights, Big Cancer: Melatonin-depleted blood spurs tumor growth,” SN: 1/7/06, p. 8). Are you really going to tell me that you aren’t going to take melatonin—if you’re convinced that […]

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  2. Babies show budding number knowledge

    By 7 months of age, babies often can tell the difference between two and three entities, at least under certain circumstances.

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  3. Ecosystems

    Corals don’t spread far from their birthplaces

    Creating a marine protected area might offer only limited benefits to vulnerable corals, because viable coral larvae don't appear to spread far from their points of origin.