In 1999, while sitting at a bus stop in Cuernavaca, Mexico, a Czech physicist named Petr Šeba noticed young men handing slips of paper to the bus drivers in exchange for cash. It wasn’t organized ...

If you buy something using links in our stories, we may earn a commission. Learn more. A few minutes into a 2018 talk at the University of Michigan, Ian Tobasco picked up a large piece of paper and ...

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Remember the graph paper you used at school, the kind that’s covered with tiny squares? It’s the perfect illustration of what mathematicians call a “periodic tiling of space”, with shapes covering an ...

Frank A. Farris does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond ...

Pattern formation in physical, biological, and sociological systems has been studied for many years. One area where it has been of growing interest is in crime modeling. Pattern formation in physical, ...

Re "The New Math: Three Concepts in Two Years; Common Core drives new look at math instruction," July 22 article: In 2008, the National Mathematics Advisory Panel recommended that schools prepare more ...