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Who says it was? We have no evidence whatsoever that there are other universes, or that the universe is somehow cyclic. In fact, it's quite likely that we can never have proof of that, since we'd have to somehow go outside the universe to check. Good luck with that.
Einstein's theory explained the Big Bang. He said 'we are like insects living in a bubble and when the bubble expand, that is call the big bang.' But what happen before the Big Bang? that is when string theory comes in. Strings theory says that there are other universes out there, there is no rule law of physics that says 'multi universes cannot exists'. where the big bang came from? when the two universes collide, it can form another universe, when the universe spit in half, it becomes two universe. That is what physicists think 'that is the big bang.
What else can I help you with?
When was Secret Rhythm of the Universe created?
Secret Rhythm of the Universe was created in 2001.
When was Broad Universe created?
Broad Universe was created in 2000.
When was Strange Universe created?
Strange Universe was created in 1996.
When was Recording the Universe created?
Recording the Universe was created in 2010.
When was A Universe of Consciousness created?
A Universe of Consciousness was created in 2000.
When was Teens in the Universe created?
Teens in the Universe was created in 1974.
When was Digital Universe created?
Digital Universe was created in 2006.
When was Miss Universe created?
Miss Universe was created in 1952.
When was Electric Universe created?
Electric Universe was created in 1991.
When was Visions of the Universe created?
Visions of the Universe was created in 1981.
When was Playhouse of the Universe created?
Playhouse of the Universe was created in 2006.
When was Incredible Universe created?
Incredible Universe was created in 1992.
