What if the Big Bang wasn't the beginning? New research suggests it may have taken place inside a black hole

A cosmic bounce inside a black hole may have birthed our universe, challenging the long-held Big Bang theory. Physicist Niayesh Afshordi and colleagues propose that our cosmos emerged from the collapse and rebound of matter in a massive black hole.

"Our calculations suggest the Big Bang was not the start of everything, but rather the outcome of a gravitational crunch or collapse that formed a very massive black hole — followed by a bounce inside it," Afshordi explains.

This "black hole universe" model, grounded in known physics, addresses fundamental questions left unanswered by standard cosmology. It predicts a slightly curved universe and explains cosmic inflation without introducing mysterious new fields.

While radical, the theory offers testable predictions and could illuminate other cosmic mysteries, from supermassive black holes to dark matter. It paints our universe as part of a larger cosmic cycle, nestled within a parent universe.