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Hi, I'm new and have a bunch of questions, this is my first one. Hope you can help!So there's plenty of evidence of a huge explosion/expansion 13.7 thousand million years ago. But what makes us think it was the beginning of EVERYTHING. Couldn't it have merely been *a* big bang caused by something? Couldn't the Big Bang turn out to be relatively tiny compared to the actual entire universe?
Okay thanks. But I thought it was a really common view that the Big Bang was *the* start.