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  1. Health & Medicine

    Being a dad comes naturally

    Men whose wives are about to give birth show hormonal fluctuations that may predispose them to better parenting behavior.

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  2. Health & Medicine

    Heart risks linked to infertility syndrome

    Women with polycystic ovaries—commonly linked to infertility—are more likely than women without the disease to show early signs of heart disease.

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  3. 19223

    The July 8 story about “trilobite farming” states that “these trilobites would be the earliest creatures known to have forged a partnership with another species.” What about the fact that eukaryotes formed a partnership with other single-celled creatures that became mitochondria or chloroplasts? Now, if you mean that this was the first extracellular partnership, then […]

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  4. Trilobites might have invented farming

    A close look at fossils raises the possibility that a type of trilobite farmed bacteria.