Reply to post: Re: I know I'm late to the discussion

Three certainties in life: Death, taxes and the speed of light – wait no, maybe not that last one

You aint sin me, roit Silver badge

Re: I know I'm late to the discussion

There was plenty of light in the earliest stages of the universe (in fact it was mostly photons) but they were affected by the density of mass. It wasn't until approximately 380,000 years after the Big Bang that the universe had cooled enough to allow atoms to form, releasing the photons we see today as the CMB from the sub-atomic soup.

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