If space is made of sub-quantum points that spin in 3 directions at once and the spins are perpendicular it makes a lot of sense the energy fields and even movement is limited to 3 dimensions. Gluing the points in space together is planck time that is a sort of gravity or field between these points. It is a theory of mine that eliminates the need for strings and other dimensions. For a short video email me at firstname.lastname@example.org
String theory is a mathematical model, it will never be provable. Any explanation of sub-quantum processes and/or use of rational numbers being substituted for imaginary numbers can ever be substantiated. I personally believe a Cartesian point can spin in three directions at once and strings of these points cause entropy resulting in a resonance projected to a quantum level. String theory is actually based on general relativity and the LHC will find both the Higgs Field and the graviton. Then mathematics will explain or prove M theory.