Are black holes portals to other universes?
According to a new quantum theory based on loop quantum gravity (LQG), that’s exactly what they are. LQG argues that black holes might be tunnels or passageways to other parts of our universe or perhaps portals to other universes.
https://www.treehugger.com/black-holes-are-portals-to-other-universes-according-to-new-quantum-4864010