What caused the big bang? - The answer it gives is the collapse and expansion of a prior universe., The cyclic universe theory - is a model of cosmic evolution according to which the universe undergoes endless cycles of expansion and cooling, each beginning with a “big bang” and ending in a “big crunch “, According to the Cyclical Universe Theory, - our universe began when another universe collapsed violently into a single point then exploded out again., Conclusion - Space and time had no beginning. Cycles of expansion, contraction, collapse, and explosion have been going on forever.,

The cyclical universe theory

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