How could the universe be formed by energy if there was nothing before the universe?
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We have some confidence about what happened down to trillionths of a second after the Big Bang, because we either know or can make educated guesses about how energy and matter behave at extreme energy/temperature/pressure, but we don’t know, and may never know, why it happened/where the energy came from/what existed before. This is because 1) as far as we know no information was passed into the current universe from whatever May or may not have existed previously and 2) we don’t know what could cause a big bang to happen.
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