Personally, I think that no more explanation is required than the current model proposed by science; however, a few people (and not just religious folks ) question that model and others think there might more be to it.
So, I would add that I accept the current cosmological model proposed by mainstream science which I guess is The Big Bang. However, I would like to add that many people (mainly people belonging to the Big Three Abrahamic religions) propose that God had a hand in making everything; what I would like to add is that even if there was a Grand or Intelligent design discovered in the Universe its mere existence would be a long, long way away from proving that that designer was the God that almost everybody means when they say God which is Yahweh The God of the Bible.
If there was a grand design in how the Universe formed or in how humans made the transition to the species they are today, then it would be just as plausible or even more so to assume that that god was a monolith like those envisioned by Arthur C. Clarke, or ancient astronauts like those envisioned by Zechariah Sitchin and Erich Von Daniken, or something like The Great Old Ones dreamed up by H. P. Lovecraft, or the deist Great Architecht of the Universe, or the jocular Flying Spaghetti Monster that many atheists venerate in a humorous fashion and many other types of gods that humans have and haven't dreamed up yet than to assume that the discovery of some kind of plan in the universe automatically meant that Yahweh was real and as a result everyone needed to follow The Laws of the Judeao-Christian faiths (including Islam) to the letter.
http://www.youtube.com/watch?v=4E-_DdX8Ke0 -- Carl Sagan waxing poetic on god and gods.
