Randall's maze rapup

First Kaluza-Klein theory. There’s a lot of stuff I don’t understand at all but I will try to explain it best I can. It’s a theoretical model that Theodor Kaluza came up with in the early 20th century. It was meant to take the new model of gravity (Einstein’s general relativity rather than Newton’s model) and combine it with electromagnetism (electronic fields and magnetic fields and light and the like). Kaluza, who was German, figure that if you have 4 spatial dimensions you combine gravity and electromagnetism by looking at electric fields and magnetic fields differently. Just like gravity is curved in the 3 normal spatial dimensions, the fields are a result of curving in the extra dimension. I have no idea how this allows one to combine gravity and electromagnetism but whatever. People had some problems with this extra dimensions stuff and so along came the Swedish physicist Oskar Klein who said that we hadn’t know about the extra dimension was because it was very small and curled up really tight. This (then very ) weird theory fell out of favor but of course when string theory came along it was looked at again and is now seen as a sort of predecessor of string theory.