So you have no idea where it began either. Just started with the big bang, Got it.
So tell us what you would explain to a 5 year old when he asked where everything came from.
I don't spend much time talking to 5 year olds. "Where" everything came from may not even apply. One could go on and on into "the past" progressively asking the same question as the last known "creator" was revealed.
Much of the religious indoctrinated suggest god created everything. OK then who or what created this god and so on and so forth. Quickly(for some people) that strategy becomes futile. The suggestion that because the/a bible said so is perhaps the least likely path to the truth.
There are some questions that we with our human brains are just not able to proccess IMHO. To claim you or really any one living or one that has lived has the difinitive answer to this question is clown-like or worse a deception with the goal of attempting to take something from you or I for the inside track on the secrets of the universe.
I feel compelled to dress up in a costume within a room full of supposed artifacts and purported scribblings of ancient ones to address these questions. Nevermind that the farther back we go the less humans knew of the truth of their environment. Why would I ask the least informed people I know of for assistance to answer the toughest riddles?
No thanks...I'll pass on attempting to lie to a 5 year old.