The Bubble Universe Theory - Parallel Universe - Part 4/5

Bubble universe theory says that there are many universes, perhaps connected by black holes, which are altogether a sort of "multi-verse". Some think that it was two of these universes, two higher dimensions, which collided to cause the Big Bang. And many think that there's a sort of "natural selection with universes" going on - that many of those universes never developed the right physical laws to be stable, and collapsed; it's only ones like ours which have the right balance of the 4 principal forces to "survive" and eventually form life. There's also a theory that these universes are constantly being created and destroyed, and only the stable ones survive. It's a lot to get your head around...time, space, other dimensions, all get messed up - I for one can't comprehend what it's like. But it's all very conceptual and mathematical so far.
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