This is the paper that hooked me: "Imaginary numbers are not real—The geometric algebra of spacetime" https://link.springer.com/article/10.1007/BF01883676 htt

This is the paper that hooked me: "Imaginary numbers are not real—The geometric algebra of spacetime" https://link.springer.com/article/10.1007/BF01883676 https://link.springer.com/article/10.1007/BF01883676 (http://geometry.mrao.cam.ac.uk/wp-content/uploads/2015/02/ImagNumbersArentReal.pdf http://geometry.mrao.cam.ac.uk/wp-content/uploads/2015/02/Im...)