Northern Baltimore’s I-95/695 highway interchange is a “topological masterpiece,” and its superb “mathematical aesthetics” might just save it from being destroyed. [Image: “I was in a web of braided highways.” New Scientist]. “In the spring issue of The Mathematical Intelligencer, Michael Kleber, a topologist at MIT, waxed enthusiastic about [the interchange’s] ‘non-trivial braiding‘: while it … Continue reading The knot driver