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And photons and neutrons meet the temperatures this high when they collide so they can stay together. As the universe cools, electrons can combine with hydrogen and helium nuclei to form atoms. And the rest of the universe of atoms form inside early, very massive stars. So this is where several, inside these stars, this is where several photons and neutrons adhere. As a, as a new thing, and this requires a lot of high energy collisions, and this only happens when conditions are really really hot. And this energy must overcome the repulsive force between the, the photons and the electrons.