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Yes. We can either look for the cosmic neutrino background or for gravitational waves associated with the big bang. Both of these probe the conditions considerably earlier than the the 380,000 years after the big-bang probed by the CMB. Neither of these are fanciful ideas - there are good theoretical reasons to expect both to exist, and in both cases there ...


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You are concentrating on the soup of particles and do not count the soup of radiation, the zero mass particles. Just acceleration and deceleration of of charged particles generates radiation. The accumulation into galaxies and star systems would release gravitational radiation. The stars themselves release black body radiation all the time from their ...


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