I'd like to mention, since this comes often up with people not well versed in physics; is that to make any sense of our greater understanding of the universe and its existence is to think of it as eternal.
No beginning, no end, just existence that has been and always will be.
Because the most typical question I hear is "well how did it start".. So while we can say the big bang was the start of our universe (which for all we know could be part of infinite universes in bubbles) it is not a good idea to start thinking in our earthly terms of a beginning and an end.
Its VERY hard for us to wrap our minds around something not having a start or finish, but I think for physics to make more sense we need to go that route and force ourselves to at least consider this as the ultimate explanation.
Our brains are hardwired to think in these terms, so its not an easy thing to accept without a lot of consideration.
Again its probably why a great number of physicists are non believers, simply because for them depending on their views of course within physics; it makes sense for there to be no creator and that this is all a process which exists whether we believe it does or not.
Just like Lawrence Krauss has a decently simple way of explaining a universe that comes from nothing, since its also a common thing to hear people say "how does something come from nothing!"
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Allskonar fyrir Aumingja!!
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