Loop quantum gravity has this idea called a planck star, and it’s the most elegant fix to the black hole singularity problem I’ve come across:
Classical GR says a collapsing star can crunch down to a singularity – infinite density at a point, physics’ polite way of saying “the math broke”. Planck stars say nah. Once density hits planckian (5.1 × 10⁹⁶ kg/m³, comically extreme), quantum gravity kicks in, the inward pull gets balanced by a repulsive force, and the collapse halts. You get a stable-ish ball at planck density. Not point-sized either – density triggers it, not size. Could be macroscopic.
And it’s not stable forever. It’s mid-bounce. Microseconds in proper time, billions of years from outside thanks to time dilation. What we call a black hole is just a very slow ball hitting the floor. PBS Space Time breaks it down nicely.
talkie: a 13B language model trained only on pre-1931 text. no modern web, no leakage, no awareness of anything after 1930. that last part is what’s wild.
think about what this unlocks – archaeology, historiography, counterfactual history, reviewing past predictions of the future from the inside. every historian alive is contaminated by knowing what came next. talkie isn’t.
it’s also, i’d argue, the closest thing to a time travel experience we’ll ever get. physics doesn’t permit the real version in either direction (forward you just wait, backward causality says no). a conversation with something whose worldview ends in 1930, with no memory of WW2, no Hitler, no internet, is functionally the same trick.
now imagine the 17th century version. that’s the door this opens 🤯