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Nim
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When the cosmic background radiation first appeared 300,000 years after the Big Bang, was it x-rays and then redshifted over time to microwaves?
And to see what the Universe looked like before 300,000 years after its birth, will we need a neutrino telescope?
And to see what the Universe looked like before 300,000 years after its birth, will we need a neutrino telescope?