I been studying quantum field theory and standard model lately. I not see how a unified theory could fit between quantum field and special or general relativity. One being for big objects and the other for microscopic one. In fact, standard model not seem to be all proven. Many particles are not yet observe, not counting some others particles not include but theorized. There is such a zoo of particles that a cat will loose his kittens there. Other then understanding what inside black holes or the initial singularity, quantum field theory might stop where the other one begin, some event horizon... Photon being both wave and energitic particle, link both theory in a way. Gravity do not exert any effect inside particules, Is Higgs field proven or do we need graviton to link both theory? Still linking may not unified them. Why it is not acceptable that one begin where the other finish, at the atomic level?