The concept that every black hole contains a new universe is an idea that exists in some speculative theories and hypotheses, but it is not currently supported by empirical evidence or widely accepted in the scientific community.
Black holes are incredibly dense regions of spacetime where matter has collapsed under its own gravitational pull. According to our current understanding of general relativity, black holes have a singularity at their center, a point of infinite density where our physical laws break down. Anything that crosses the event horizon of a black hole, including matter and even light, is believed to be trapped inside and inaccessible to external observers.
The idea that black holes could give rise to new universes stems from certain interpretations of quantum mechanics and theoretical physics, such as the concept of a "white hole." A white hole is a hypothetical region of spacetime that is the reverse of a black hole. Instead of matter collapsing inwards, a white hole would emit matter and energy outwards. Some theories propose that a black hole singularity could act as a gateway to a white hole, potentially leading to the creation of a new universe.
However, it's important to note that these ideas remain highly speculative and are still the subject of ongoing research and debate. The nature of black holes, their internal structure, and the possibility of connections to other universes are active areas of study in theoretical physics and cosmology. At present, we do not have concrete observational evidence or a well-established theoretical framework to support the notion that every black hole contains a new universe.