This may seem a little off-topic, but nature often abounds with solutions to problems we have yet to dream of and, since nature often has a smarter way of doing things, developed through the trials and errors of evolution, we can learn a lot from the living world around us. It turns out, for example, that the mantis shrimp has evolved powerful vision that includes the ability to detect polarised light, and not just linearly polarised light; they can also sense circular polarisation.
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