Have you ever wondered if we're actually living in the universe we think we are? Scientists are exploring whether we're actually still living in a black hole.
Robert Mann, professor of physics and applied mathematics at Canada's University of Waterloo, told The Express: "We further want to connect with ideas of holography, which is the notion that gravitational physics in one dimension of space and time is equivalent to non-gravitational physics in one dimension smaller.
"As this was discussed, the idea was that we would be in the smaller dimension and that one dimension larger than us, in a five-dimensional universe, there could be some kind of five-dimensional star that could collapse into a black hole.
"There in the process be an explosion of a membrane of matter and that our universe was this membrane, so to speak."