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And the reason that the photons couldn't escape couldn't go anywhere, before recomination. The universe was hot. It was hot. It was dense plasma and electrons. This is where electrons scattered photons making the universe into a thick fog, like this, essentially trapped. So photons, they were hitting these, all these electrons, they were being scattered back and forth like a pinball machine or like on a pool table. They couldn't go anywhere. The Sun, that does something similar with photons that are being formed deep inside the Sun. It takes them up to 40,000 years or longer to get to the surface of the Sun. The photos here, they make its way out from there again, simply because they're bouncing around inside the Sun, and they can't come out similar sort of process when it happened for the recomination there, it'll be the universe.