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Originally Posted by Praxus
There can be NOTHING outside of the Universe. The Universe is ALL that exists, whether we know about it or not.
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There is simply no evidence whatsoever to back that assumption.
We simply DON'T KNOW what exists beyond the boundries of the universe. Could be an endless vacuum, another universe, or a brick wall.
We just don't know. What we DO know is that the universe is expanding at approx the speed of light, and it always has been since the dawn of time(ie, since the big bang). This is one of the most basic- and most well proven- tenets of modern cosmology.