Galois theory occurence in (very) Applied Mathematics

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Can Galois theory be used in (very) Applied Mathematics; e.g. Population Dynamics, Biostatistics or $\langle$some Mathematics course that is (almost) opposite of Abstract Algebra$\rangle$. I know that Galois theory is used in other Algebra subjects (like Cryptography), but I'm looking for those really unexpected connections of Galois theory with subjects seemingly unrelated with it.