Hi all, I would like to ask why only Protons were selected for collision in LHC project? Why not other fundamental particles? When I was watching the programme on big bang by Michio Kaku and Lawrence Krauss, they were saying at the earliest instant of big bang, there were four forces namely, gravity, weak and strong nuclear forces and electromagnetic forces tied together but "some how" they split apart, which resulted in the subsequent creation of matter. So, my question here is, how we are sure that proton-proton collisions at the speed of light would definitely simulate the most likely conditions of early instance of universe? I mean there could be some other particles or combination of other particles or combination of various forces and particles and other permutations and combinations. Is the proton-proton collision to result in the simulation of early instance of big bang based on some strong scientific evidence? Please note, I just loved physics from childhood but unfortunately had to jump into some other field. I always loved physics and Sir Isaac Newton is my idol, but I don't have necessary education in physics to understand the very many concepts. So, please don't bash me, if this is a stupid question all together. Thanks.