Walking bookcase by Wouter Scheublin. “The movement is based on the principles of the walking platform devised by 19th century Russian mathematician Pafnuty Chebyshev… when pushed, the legs carry the object along using a complex system of cranks, links and connecting rods.

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This post is for Paul, who recently pointed out that the “ouno” logo above is an ambigram, and who suggested looking at the work of Scott Kim who made the two animated ambigrams above and below.

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Deformscape is by Faulders Studio, the San Francisco office of architect Thom Faulders. This post is for Paul, who misses posts with mathematical content, and @jennifergardy, who first pointed it out.

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When I was about 12, my dad and I built four stellated polyhedra (star-shaped, many-sided platonic solids). Dad, a mathematician and math teacher, used the book shown below as a resource and then worked out his own dimensions and angles (you can see his notations right in the book).

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