The best theory an astronomer(astrophysics, etc.) can come up with of how the world was created was because of the Big Bang.
http://www.youtube.com/watch?v=jmcf7T92H7M&feature=relmfu
As this video states, maybe the universe is going to die with a big bang and create new life while eliminating all life. We may be going in a forever cycle. Maybe we are not the first big bang? These questions can get your brain in a twist :D . The thing that got me was were they exactly like us or were they a different race(aliens). That had been progressing in their work for millions of years and they had been wipes out by a disaster of some kind or maybe, just maybe, as soon as the big bang wiped them out we were born. Theory is that the sun might die out in 3 billion/million years, Is that will wipe us out?. Are we just in a never ending cycle of big bangs? I would like your opinion on this.
P.S. Thanks Saw for creating this section. :)