Hawking, S.W. and G.F.R. Ellis. The cosmic black-body radiation and the existence of singularities in our universe. Hawking, S.W. and R. Penrose. The singularities of gravitational collapse and cosmology. Proceedings of the Royal Society of London .
Scientists are amazed that the universe contains matter at all.
Nearly all possible universes created by random chance would contain no matter or would have ended long before now. The amount of matter is critical. The universe was originally filled with quarks and antiquarks, which combined to annihilate each other to form the 2.7 K background radiation temperature of the universe. Quarks were in excess of antiquarks by a ratio of 1,000,000,001 to 1,000,000,000. The remaining quarks made up all the matter that exists in the universe.