Black holes might actually be doors to a place where time just doesn't happen at all. No clocks, no aging, nothing.
March 27, 2026
Original Paper
Black holes as portals to an Euclidean realm
arXiv · 2603.25313
The Takeaway
Physicists are investigating whether the interior of a black hole undergoes a 'signature transition,' where the dimension of time effectively turns into a fourth dimension of space. This theory suggests that black holes act as mirrors to the Big Bang, housing a 'Euclidean' core where the standard laws of cause and effect are replaced by pure geometry.
From the abstract
Motivated by a one-cycle cosmological scenario where the big bang marks the egress from a Euclidean metric signature regime, we investigate the possibility of black holes (BH) hosting the mirroring entryways. Analogous to the inflationary stage following the exit end, the entry portals must be enveloped by de Sitter cores inside BHs, in order to satisfy regularity conditions at the metric signature transition boundary. We examine the interior structure of BHs that could be consistent with such a