Is it possible that black hole is a tunnel which transfers matter and energy to other parallel universe?
Is it possible that black holes are portals to other universes?
Could this universe be inside a black hole? Can another black hole exist in a black hole? Is it possible that we are in the event horizon of a black hole? Could a black hole have planets orbiting it? Are we inside a black hole? Are there more theories for or against our observable universe (93 billion light years across) being inside a black hole? Does our universe exist inside a black hole? Is it possible to have the event horizon of a black hole without a singularity? Can a black hole be moved? Do we live inside a black hole? Can a black hole be a worm hole? Is there a singularity inside the event horizon of a black hole? If you could reach the black hole center, would you just see a tiny black orb? Is it possible to create an artificial black hole? Is a black hole really a hole? What would be the implications if our universe existed within a black hole? Is there a black hole in the center of our galaxy? Could our universe be nothing more than a black hole? Is all matter in the universe on a course to become part of a single solitary black hole? Is there a black hole at the center of every galaxy? Is it possible for me to ever get to the event horizon of a black hole? Is it possible to make an artificial black-hole? Can a black hole become a star again? Can a black hole be created inside a black hole? Is there a ring current at the event horizon of a black hole? Are we in a larger version of the outflow of a universal black hole? Given enough time, will the whole universe become a black hole? Is the black hole in the center of our galaxy moving? Do all galaxies have a black hole? Can we artificially create a black hole?