The notion that we might be living inside a black hole is an intriguing idea, but it's important to note that it remains a speculative hypothesis and is not currently supported by scientific evidence. The idea stems from certain mathematical models and theories that explore the nature of black holes and the structure of the universe.
The concept suggests that our universe could be a "baby universe" formed within the event horizon of a larger, pre-existing black hole in a parent universe. However, it's worth noting that this idea is highly theoretical and lacks empirical confirmation.
As for the question of why we haven't found any extraterrestrial life, there are numerous possible explanations that do not rely on the hypothesis of living inside a black hole. The search for extraterrestrial life is a complex and ongoing scientific endeavor, and there are several factors that could contribute to the lack of confirmed discoveries thus far. These factors include the vastness of the universe, the limitations of our current technology and observational capabilities, the challenges of interstellar travel and communication, and the conditions required for the emergence and development of life.
It's important to approach such ideas with scientific skepticism and to recognize that our understanding of the universe is constantly evolving. While intriguing concepts and hypotheses are valuable for generating scientific inquiry, they require rigorous testing and evidence to be considered as viable explanations.