Mathematician Eugenia Cheng explores the uses of math beyond the classroom. Read more columns here. I’ve been doing various sewing projects during the pandemic, starting with masks and then branching ...

Tangles of string typically become knotted, from macroscopic twine down to long-chain macromolecules such as DNA. Here, we demonstrate that knotting also occurs in quantum wavefunctions, where the ...

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From whimsical flower crowns to carelessly tied shoelaces to hopelessly tangled headphones, knots are everywhere. That’s not surprising, as knots are quite ancient, predating both the use of the axe ...