Question

how the universe born

Answer 1

It does not know even a very best scientists......

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Answer 2

Our universe was born about 13.7 billion years ago in a massive expansion that blew space up like a gigantic balloon.
Scientists have discovered a predicted thermal imprint of the Big Bang, the universe-pervading cosmic microwave background radiation. And we don't see any objects obviously older than 13.7 billion years, suggesting that our universe came into being around that time.
According to the standard Big Bang model, the universe was born during a period of inflation that began about 13.7 billion years ago. Like a rapidly expanding balloon, it swelled from a size smaller than an electron to nearly its current size within a tiny fraction of a second.

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