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  1. Health & Medicine

    Full-Length Pregnancy: Progesterone product may reduce premature births

    A drug related to the female hormone progesterone helps some pregnant women who are prone to premature birth extend their pregnancies.

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  2. 19253

    I have always been fascinated by the subject of this article. I have a simple question: Is there a definitive set of standards (physical or behavioral or both) that defines modern Homo sapiens? Lew RobertsFranklin Square, N.Y. No. This is a topic that inspires much discussion and debate .–B. Bower

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  3. Anthropology

    African Legacy: Fossils plug gap in human origins

    Scientists who discovered three partial Homo sapiens skulls in Ethiopia that date to nearly 160,000 years ago say that the finds document humanity's evolution in Africa, independently of European Neandertals.