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  1. Health & Medicine

    Mother Knows All

    Fragments of a fetus' genetic material that leak into a pregnant woman's bloodstream reveal details of early fetal development.

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  2. Tech

    Hooking up

    Cleverly designed molecules can self-assemble into networks and stay robustly connected.

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  3. Humans

    Letters from the November 10, 2007, issue of Science News

    Thinking it through Bjorn Merker says that “the tacit consensus concerning the cerebral cortex as the ‘organ of consciousness’ … may in fact be seriously in error” (“Consciousness in the Raw,” SN: 9/15/07, p. 170). But the real tacit consensus is that the cerebral cortex is the organ of conceptual consciousness, of thinking and reasoning, […]

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  4. Math

    Numbers, by Any Other Name

    Most Westerners have come to represent numbers with Hindu-Arabic characters.