Main Question or Discussion Point
I don't understand how the space-time fabric works. I've seen videos where the sun is in the space-time fabric and it makes a ripple in it and the earth revolves around this. This works fine if our universe was 2D, but what if there was something above the sun in that diagram? Basically, I'm confused on how you put 3D space along with a fourth dimension time in a 2D plane...