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Asked by culshawwesttaylor to Clare, Ezzy on 14 Mar 2012. This question was also asked by evanspuddifoot.
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Elizabeth Pearson answered on 14 Mar 2012:
No one really knows. We have no way of knowing what the universe was like before the Big bang. There is something called the big bounce theory – that the universe will one day start to shrink again until it becomes really small once more and there will be another big bang. Evidence points towards the universe reaching a certain size and stopping, rather than shrinking though.
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Clare Burrage answered on 14 Mar 2012:
No one really knows, because our theories stop working at the very high temperatures that were around at the Big Bang. We’re going to need a better understanding of physics at high energies and temperatures before we can answer that question.
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