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  1. Anthropology

    When female chimps become baby killers

    Although long thought to be rare, instances in which female chimps band together to kill other females' infants occur fairly regularly under certain circumstances.

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  2. 19837

    As I read this article, I wondered if the sex of the killed infant was determined. In a troop characterized as having a disproportionate number of females, could it be that the chimps are selectively killing females in an attempt to balance sexes in the group? Eliza GouverneurPrinceton, N.J.

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  3. Health & Medicine

    Migraines in men linked to heart attack risk

    Men who experience migraine headaches are somewhat more likely to have heart attacks than are other men.