Theoretical physicists are reconsidering whether black holes create event horizons or if these horizons form after a singularity appears [1].
This shift in perspective addresses the black-hole information paradox and incorporates quantum-gravity effects. If the traditional model is incorrect, it would fundamentally change the scientific understanding of how gravity and time operate at the most extreme scales of the universe [2].
Researchers, including scientists at the University of Miami, are examining a theory that is approximately 50 years old [3]. The current consensus has long held that black holes are infinite singularities [4]. According to general relativity, material that crosses an event horizon is trapped forever until the last day of cosmic time [5].
However, new models suggest a different sequence of events. One theory proposes that the collapse of a massive star might not form a singularity hidden behind an event horizon. Instead, the collapse could trigger the birth of a tiny new universe inside the dying star [6].
Other researchers suggest that the relationship between the singularity and the horizon may be the opposite of what was previously believed [7]. This challenges the idea that event horizons are a necessary and immediate feature of black-hole formation [8].
These developments aim to resolve contradictions between general relativity and quantum mechanics. By rethinking the nature of the singularity, scientists hope to determine if these regions are permanently hidden, or if they interact with the observable universe in ways previously considered impossible [2].
“"Black holes have been understood as infinite singularities for a century."”
The transition from viewing event horizons as inevitable boundaries to potential after-effects or nonexistent features suggests a major pivot in theoretical physics. If singularities can lead to the creation of new universes rather than just acting as cosmic dead ends, it provides a potential mathematical escape from the information paradox, which currently contradicts the laws of quantum mechanics.
