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  1. Code of Many Colors

    Researchers have yet to find markers for race in the genome, but understanding the biology underlying perceptions of race could have dramatic social and personal consequences.

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  2. Math

    Manuscripts as Fossils

    A new mathematical model estimates how many medieval manuscripts have survived to the present.

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  3. Math

    Sea Shell Spirals

    The golden ratio doesn't figure into the spiral structure of the chambered nautilus shell.

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  4. Humans

    From the March 30, 1935, issue

    Dust storms over Washington, D.C., 300 successive generations of fruit flies, and the world's oldest cemetery.

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  5. Humans

    Science Cartoons

    The science-themed cartoons of Sidney Harris have entertained readers of magazines ranging from American Scientist to The New Yorker for many years.