Grand unification can be considered as a virtual crossword ideas, hypotheses and theories. Compose and solve this crossword, we develop new ideas and hypotheses, which intersect with each other. The idea of space consisting of unit cells allows us to relate gravitation to the ability of unit cells to change volume, and electromagnetism to the ability of unit cells to internal movement. The ability of unit cells to form short-range order suggests that photons, leptons, mesons and baryons have structure of regular and semiregular polyhedra. Applied to dark matter, new model of elementary particles leads to the conclusion that elements of DM are non-relativistic nuclei consisting of neutrinos or antineutrinos. It is alleged that neutrinos are capable to form short-lived Cooper pairs most of which immediately decay appearing oscillation, and other fuse into nuclei of deutrinium, the lightest element of DM.