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  1. Anthropology

    Ancient head case

    A 1.8-million-year-old Homo erectus skullcap came from a 1-year-old child whose brain grew at a rate more like that of chimpanzees than of people.

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  2. 19464

    I was pleased to read that one of the most mathematically pretty sphere-stacking arrangements (the lovely 24-cell) occurs in four dimensions. The nice thing about four dimensions is that, by letting time be one dimension and using a good three-dimensional computer-graphics package, the arrangement can be viewed on a computer. Dan RyanPhiladelphia, Pa.

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  3. Math

    Oddballs

    Mathematicians have found that it's easier to pack spheres in some dimensions than it is in others.

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  4. 19463

    Surely, you mean ale.