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What if the Big Bang Wasn't the Beginning? Research Suggests It May Have Taken Place Inside a Black Hole

  • A new paper published in Physical Review D proposes that the Big Bang occurred inside a massive black hole formed by gravitational collapse.
  • This model is based on Roger Penrose's 1965 proof demonstrating that, under broad conditions, the process of gravity pulling matter inward inevitably results in a singularity—a point where the laws of physics cease to apply—highlighting a profound theoretical challenge.
  • The authors show that the collapse can instead produce a bounce within the black hole, combining general relativity with quantum mechanics without requiring exotic physics.
  • This bounce predicts a small positive spatial curvature of the universe, which ongoing missions like Euclid may confirm to support the black hole universe idea.
  • If true, this suggests our universe is part of a cosmic cycle shaped by gravity and quantum mechanics, continuing from a parent universe rather than emerging from nothing.
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The Conversation broke the news in on Tuesday, June 3, 2025.
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