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  1. Astronomy

    A New Spin

    Using a flotilla of spacecraft to study X-ray emissions from the vicinity of black holes, astronomers are nudging ever closer to the whirlpool of activity surrounding these gravitational monsters.

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  2. Math

    The Coin in the Cake

    Hiding a coin in a cake offers a lucky slice and a tantalizing math problem.

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  3. Visions of Infinity

    Tiling a hyperbolic floor inspires both mathematics and art. Go to: Visions of Infinity

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  4. Humans

    From the December 19 & 26, 1936, issues

    CHRISTMAS HOLLY TREES HAVE THEIR FLOWERS TOO Despite the popularity of the familiar red holly berries for Christmas decorations, few of us are familiar with the rare beauty of the holly tree’s flower.