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Fractal Holiday

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Happen to have any spheres with mirrored surfaces lying around? If so, you can make your own sphere inversion fractals, as today's gallery of pictures shows. Here's the basic idea: take three different-colored reflecting balls and arrange them so that each just kisses both of the other two. Read more »

Folding Challenge: Can you do It?

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Your challenge, should you choose to accept it, is to use the information in this article to construct an actual physical model of one of the more interesting shapes or surfaces featured there, and send a photo to [email protected] -- if enough photos come that way, there will be a... Read more »

Macadamia Grocery Geometry Challenge

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Here's the challenge: see if you can find a way to have five (or more?) cylinders of an aspect ratio at least close to 9.5 : 7 all touch each other simultaneously, and send a picture of the configuration to [email protected] -- the first/best solutions will be posted in a... Read more »

Plenty of Polyhedra

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Today's will be the last Bridges column, at least until next year -- not because there isn't plenty more to share, but because there have just been too many other things stacking up on the Math Mondays shelves. The final installment for this year is devoted to polyhedra and some... Read more »

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