[The Daily Galaxy] “Our own Universe may be the interior of a black hole existing in another universe.” In a remarkable paper about the nature of space and the origin of time, Nikodem Poplawski, a physicist at Indiana University, suggests that a small change to the theory of gravity implies that our universe inherited its arrow of time from the black hole in which it was born.
Poplawski proposes that the universe in which the Earth exists may be located within the wormhole of a black hole which itself exists in an even larger universe. A universe could exist ‘inside every black hole,’ claims scientist.
Using an adaptation of Einstein’s general theory of relativity, Poplawski analysed the theoretical motion of particles entering a black hole. He concluded that it was possible for a whole new universe to exist inside every black hole, which could mean that our own universe could be inside a black hole as well.
“Maybe the huge black holes at the centre of the Milky Way and other galaxies are bridges to different universes,” he told New Scientist.