Physicists propose a new theory suggesting our universe could have originated inside a black hole in a previous 'parent' universe.
According to this model, the Big Bang was not the beginning, but a transition point in a cycle of universe creation and collapse.
The theory is based on the Pauli exclusion principle, preventing matter collapse in a dying universe and causing a 'bounce' to form a new universe.
This model, rooted in general relativity, offers testable predictions like a slightly curved universe, potentially challenging the belief in a singular universe origin.