There are people who write about this stuff in a serious context - be it quantum gravity, string theory, or other fringe things; not to say that they are "fringe science", but these sort of topics, when investigated seriously, are not exactly tea-time chatter (unless you happen to live with theoretical physicists). Try investigating some of the writings of Edward Witten, Kip Thorne, Stephen Hawking, Michio Kachu, and a laundry list of other contemporaries who make it a point to try and publicize science.
I haven't read all the pages of the thread - but, to a point you asked as to why would the Big Bang (or anything, for that matter) happen, these types of issues are investigated/hypothesized about in the aforementioned folks' writings. I'm not going to try and do them justice in a forum post, so if you really are interested in these types of things, look into it. If you want to "dive right in" (and not understand anything), Kavli Intstitute of Theoretical Physics (KITP) makes alot of these lectures public, and puts them on their website. Fun to listen to, but unless you have a Masters/PH.D on the topic, sometimes a bit hard to understand.
Posted 4 months, 4 weeks ago