Evolve how? We know almost nothing of the universe. For all we know every ten million years stars may recoalesce rapidly and blink out the macarena. No one knows because it’s 13 billion plus years old and we aren’t.
How old is the universe? We posit 13 billion years cause it’s a reverse extrapolation of the velocity or acceleration of stars outward. But we can only see the light within a timeframe. Universe could be so massive it would break big bang hypothesis.
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