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i dunno. i just gotta say, how can there be a "big bang" with NOTHING??
i mean science really hasnt made a way to make something out of nothing? so how can there be a "bang" with nothing. thats about all i have to say.
Its simply pysics we don't understand yet. Trying to grasp what was before the "Big Bang" is like trying to understand what happens to your concious when you die (bad analogy, bear with me). We can't measure or see what was before the Big Bang like how we can't see what happens to your concious or perspective when you die.
However, moving slightly off topic, our known universe is behaving erratically. Its doing things that technically shouldn't happen from our current understanding of physics. For example: the universe is expanding faster than the speed of light and some galaxies are moving away from us faster than the speed of light (nothing can travel faster than light fyi from our current understanding of pysics).. We know this because the light emanating from these galaxies is fading out from our current view from earth, meaning eventually they'll be moving away faster than their light can reach us (I think thats how it works, it inolves the universe "stretching" its weird, go google it, haha). Another weird thing is that recent studies have shown that also the "stretching" of the universe is accelerating. Granted we only have a limited view point of our known universe, but we work with what we have. This means they're alot of things that will take a long, long while for us to figure out. Now, back to the point I was making earlier, these are things that we probably won't ever figure out.
Lastly, to interject what I think, haha. I believe the Universe will expand until it collopases in on itself. The density of the universe, eventually, will make it so that it will fall in on itself and become smaller then a grain of sand again. This grain of sand will then expand again and we have another Big Bang. The whole process starts over. Everything, I think. in our known universe works in a cycle. The stars down to plants and animals. Life and death, etc. Its all just really a matter of time. Only thing I can think of right now that doesn't fit with that is black holes. Then again humanity won't be alive to see the universe collapse (if it does) since our Sun will run out of fuel, expand, and consume earth in a fiery blaze, yay! But that won't be for a about 5 billion years.