The Big Bang is an event of rapid expansion of space that is conjectured to have occured approximately 13.7 billion years ago, during which, all matter came into existence. Since the big bang is what created everything all information in the Universe we inhabit, we can only know what happened during the big bang as it was a planck time old (), not as it happened during .

During the planck epoch, when , it is theorized that our Universe was a single planck length sized point, with an even planck temperature everywhere. From the big bang, natural constants were defined, but the 4 forces were all grouped into one, and by time, they all seperated into their own.

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