I went to a science museum last weekend and saw timeline of the big bang. There is a "GUT Epoch" mentioned at the beginning but then how can this be when GUT (Grand Unified Theories) was not proven due to lack of proton decay, etc. What other alternatives beyond the standard model if the strong force and electroweak was not really combined force early in the universe? Do you think this is more possible than symmetry unifying them? Would Big Bang no longer be so if they indeed came off separately? What is the list of ideas or scenerios about this in arxiv, etc.? What candidates of the mechanism? Without gauge symmetry unifying the strong and electroweak force. How do you think (or possible scenerios) how they separately came to be? I'm sure Loop Quantum Gravity people prefer this as their theory doesn't unify the forces but just cooking up quantum version of gravity.