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votes
1answer
199 views

Explanation for the notion that physical laws break down at the Big Bang

I've often heard the phrase "physical laws break down at the big bang". Why is this? Divide by zero? Please provide the mathematics.
5
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1answer
398 views

Do all the forces become one?

Were the forces of nature combined in one unifying force at the time of the Big Bang? By which symmetry is this unification governed? Are there any evidence for such unification of forces? Has ever ...