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Health & MedicineBreast milk may not be enough
Breast-fed infants need vitamin D supplements, at least in winter.
By Janet Raloff -
Placebo predictions
Giving patients placebo pills for a week before they begin to participate in trials of antidepressants can help clinicians gauge how well they will respond to the actual medication.
By Eric Jaffe -
TechThe ups and downs of routing fluids on chips
A new way to build microscale pipes in three dimensions boosts the sophistication of chips that manipulate fluids to perform chemical reactions and other tasks.
By Peter Weiss -
Unusual tumor is contagious in dogs
A type of cancer in dogs is transferred from animal to animal by exchange of cancer cells.