>like saying electric fields and magnetic fields aren't different because EM field exists. Funny you should say that, because this idea is well known as S-dual

>like saying electric fields and magnetic fields aren't different because EM field exists. Funny you should say that, because this idea is well known as S-duality [1] in Quantum Field Theory (and more generalized in String Theory). In fact, if magnetic monopoles (read: charges) exist, you could already see that simply by looking at Maxwell's equations and replacing E->B and B->-E. If you also know a bit about the Maxwell bivector, it's easy to see how closely this duality mirrors how space and time are related. [1] https://en.m.wikipedia.org/wiki/S-duality https://en.m.wikipedia.org/wiki/S-duality