mrsfoz5,
I can't work up enough steam to give you really involved and complete answers to your questions. Why? Because it's clear you don't really want such answers. How is it clear? Because you don't seem to really want to do a lot of thinking yourself--you want someone else to do the thinking and hand you an answer that is acceptable to you (without apparently, not even requiring you to do much thinking about which answers would BE acceptable, and why!).
But. I'll try to point out a few things, in no particular order.
"...If you don't know what happened, then wouldn't it be irresponsible of you to completely discount a theory...."
Arbitrarily choosing a myth that sounds nice (or, more typically I'm sure, the one you happened to be raised with) is not having a "theory." I brought up the bit about Zeus to try to demonstrate to you that there have been THOUSANDS of gods and creation myths invented throughout history--all with precisely equal reasons to believe them: NONE. I suspect that you REJECT the Zeus "theory" (and all the rest, except the "jesus" theory). Do you declare yourself irreponsible for rejecting all those other "theories."
In order to explain the world we live in only science can give answers with REASONS to believe.Science is SIMPLY the process of saying: "What might be going on here, and, if we get on to something, can we find a way to OBJECTIVELY DEMONSTRATE that our idea is "reliable," or deserves a reasonable consensus that it's "true" or "makes sense."
Science is not a religion. It's not "just a thing that's no better than any other thing." It's the ONLY THING that has allowed humans to get truths that have any MEANING or UTILITY. None of the gods, religions, revelations, prophets that have ever existed have enabled us to go to the moon, for example. But science HAS! And, to be sure, for almost all of human history, the act of going to the moon would have been considered a miraculous, magical, supernatural event of the HIGHEST ORDER!
From some things you've said elsewhere it appears that you consider the issue/phenomenon of "evolution" to have significance to the kind of questions you raise. There is HARDLY space here to discuss this topic (even though my PhD is in molecular and cell biology--which has exposed me to a lot of information about evolution). Suffice it to say that evolution is the CORE PRINCIPLE of biology, and it has been proven as fact by hundreds of thousands of the smartest people around, working long hours in the lab and field over their lifetimes, for over a hundred years since Darwin's revelatory insights. Thus, any "religion" that claims that people and animals were simply created de novo is WRONG--and it's mythical, non-real basis is established thereby.
To learn more about evolution you might visit the TalkOrigins website: http://www.talkorigins.org/
I'd also highly advise the series of videos on youtube created by "potholer 54," who is I believe a geologist. He's created 9 videos at last count, each less than 10 minutes long, and each better than the last for understanding what science can definitively claim about our origins. I recommend you start with "God and DNA Made Easy" <link>
You may not like these sites. They require THINKING and STUDYING--they don't supply easy and complete answers just handed to you. But....why not have a look, and see if life, the universe, and everything is worth learning about?