In string theory, a solution involving flat 10D space seems like a valid solution. The Universe could be described by a solution that is 10D space, all large and flat. Of course for string theory to describe our universe, 3D remain large and flat, and 6D or 7D are curled up in a Yau Calibi manifold. What I'm wondering is whether this folding of the other dimensions occurs "spontaneously" the way that proteins start out as a single 1D string of amino acids then due to thermodynamics and interactions with water and ions, spontaneously fold into a 3D structure (that is difficult to predict based solely on sequence of amino acids alone) does the universe in string theory spontaneously fold itself in such a way that 3 remain large and extended, and 6 or 7 fold up, and does it fold up only in 1 way or can it fold up many ways. Suppose it were possible to probe the planck energies with a particle accelerator, would string theory predict multiple possible conformations of these Yau-Calibi spaces? Do these spaces stay frozen and unchanging, even at planck energies? Does dark energy and inflationary expansion affect these hidden dimensions as they do large 3d dimensions? Were these hidden dimensions affect the way the Big Bang happened and its inflation? Did they fold or refold them or were they already in that configuration prior to the Big Bang? I'm a little bit confused as to whether it is 6D as in SUSY or 7D as in M-theory. I understand that KKLT allows for a positive CC using a very complex system of branes wrapping around Yau Calibi manifolds followed by anti-branes. Is this sort of thing supposed to happen spontaneously? Do Yau Calibi manifolds with magnetic fluxes naturally fold up with branes and anti-branes?