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Beyond Big Bang ?

What is there in the borderline of non-existing and existence ? It has been previously taught that "TIME" was a product of Bigbang but there are recent theories suggesting that existence of time with a different density "Before" the big bang. if it is so, what is there before the big bang ? and even if there is the endless loop of big bangs, expansions and collapses, how does it all began ? any ideas ? theories ? imaginations ?

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    Jun 2 2012: This problem will be unsolved. We won't get away beyond of our spacetime, because our existence will lose meaning. We exist in some place in space and time. If beyond space is nothing and we enter into "out-space", this "out-space" won't be empty, "out-space" will become space.
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      Jun 2 2012: I think there is hope to have some answers someday. we know things we could never think of a few hundred years ago ... your reply reminds me of another big mystery that if the universe is expanding, what is it expanding into ?
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        Jun 2 2012: we expand into what the universe creates, beyond the universe there is theorised to be nothing, and so when we exapnd we are creating what we expand into
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        Jun 3 2012: The universe could be finite and shrinking -edit- while it maintains the same size -edit- (like an increasing vacuum), it would look the same to us and science.
        -Edit- Red shift would be observable for i forgot to mention the fixed size idea.
        Thank you Stewart.
        -Second edit-The fixed size could be related to the limitation due to lightspeed, so this would not necessarily need a size fixed universe.
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          Jun 3 2012: how does that explain the red light shift? Also if it was shrinking things wouldn't be getting farther away from us

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