Do your own research. (Google is a wonderful thing

) The fact is, I stated pretty clearly that the "Big Bang" is a
theory, not a proven
fact. It is supported by all the available evidence (thereby earning it "theory" status, btw...look up the definition of the word), but as it is impossible to
prove, beyond a shadow of a doubt, science will not call it a "fact." It is simply the most likely explanation, given all known evidence at this time.
But I notice you are not willing to turn it around and use this "logic" of yours to support creationism. You seem to believe that a mystical wizard somewhere up in the sky magically created all life on earth...what evidence do you have to support that?