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How far back does physics/science take us?


Currently, only to about a few seconds after the big bang, and then with that, only with really new theories from string theory and it's derivatives. I have a feeling that our understanding of the big bang will really only increase once we manage to get out into space more. While observation from things like Hubble has helped a lot, we still can't see much near the fringes of the universe to understand it.