When it comes to the fabric of our Universe, we live in four dimensions: three space and one time. At least, that’s what it seems like. But it’s possible that at very high energy scales — or at very small distance scales — not only might even more forces unify, but we might discover that the interactions between particles spill over into even more spatial dimensions.
Is there anything we can use about these higher-dimensional ideas to learn something more about our Universe?
Or, conversely, is there anything we can use from our Universe to learn about the potential existence (and/or properties) of these higher dimensions?