I believe that question will never be answered. Space is too big a mystery for us to handle for such a vain, ignorant race. We, as humans can't even solve our own worldly problems, much less even begin to understand such a question. I'm not a scientists, or a physcologist, or even a philosopher, so I cannot understand the mathematics, phylosophical, physcological, and religious aspects of even coming close to answering such a question. We can only guess as to what "WE" think may be the answer.
I am a religous person, so I believe it is not in gods plan for us to know these answers. Our minds cannot, will not comprehend it. I probably will offend people out there who do not believe in god, so if you don't like what your reading hear, then I suggest you stop reading. However, I will stand by my own opinion on this matter. I hope that there is someone out there who will look at this with an open mind.
I would like to know the answer to that question. However, I will have faith that answers to that question and the many thousands of other questions I have will be answered some day.