so the known universe started with the big bang i accept that but that might not have been the start everyday black holes are made and they grow as they "eat" so what if before the big bang there was a known universe much like ours and all the black holes went in together and the energy got too great so it exploded in a huge fireball of energy and this periodically happens over and over and by this logic there could be more "universes" that go on the same cycle
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Sorry, but no. Scientist significantly smarter than me are somehow able to calculate that the Universe has only undergone 7 of these cycles.
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There is no way to make a black hole explode. Not even light can escape a black hole, so that means in order to get out of one you would have to go faster than the speed of light. However going faster than the speed of light would take infinite energy, so even if all the energy in the universe went in there it would still just get sucked in, and never be able to come out in an explosion.