Let's throw in another bone:
It is said by a lot of physicists that there are many more dimensions than we can see (3 spacial + 1 time). In fact, according to some theories (string theory among them) there are upwards of 10 or even 20 dimensions.
Now, suppose there are large-dimensional blobs of matter (or strings of energy, or whatever form they have). Suppose that those bits of matter collide. Would the resulting 3+1-dimensional effects be seen as pure chance by us, because we simply cannot see those higher-dimensional things?
And no, it's not my theory; I saw a TV documentary once, with some physicist telling about this theory. He claimed that there were high-dimensional planes (mathematical ones) with small bumps in them. If those planes, and those bumps in particular, were to hit each other, one would have a huge discharge of energy, which might explain the big bang. It would also mean there could be big bangs all over the place, all the time. (These would create their own 3+1-dimensional (or other-dimensional) universes.
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