Black holes have their own space, and time
Bits from Internet:
Black holes are made of matter packed so tightly that gravity overwhelms all other forces.
When you pick up a bowling ball, it’s heavy because the matter is densely packed. If you packed more and more mass into the same tiny space, eventually it would create gravity so strong that it would exert a significant pull on passing rays of light.
Black holes are created when massive stars collapse at the end of their lives (and perhaps under other circumstances that we don’t know about yet.)
Throughout the universe, stars that collapse into black holes squeeze down to an unimaginably extreme density. Under those extreme conditions, as a result of quantum phenomenon, the black hole explodes in a big bang and expands into its own new baby universe, separate from the original.
The point where time ends inside a black hole is where time begins in the big bang of a new universe.
Smolin proposes that the extreme conditions inside a collapsed black hole result in small random variations of the fundamental physical forces and parameters in the baby universe. So each of the new baby universes has slightly different physical forces and parameters from its parent. This introduces variation.
Given these “inherited characteristics, universes with star-friendly parameters will produce more stars and reproduce at a greater rate than those universes with star-unfriendly parameters. So the parameters we see today are the way they are because, after accumulating bit by bit through generations of universes, the inherited parameters are good at producing stars and reproducing.” Of course, the existence of stars is crucial because the molecular material contained in stars is a prerequisite of life.