(April 28, 2022 at 11:22 am)polymath257 Wrote:(April 28, 2022 at 10:28 am)Jehanne Wrote: Professor Sir Roger Penrose, a Nobel lauerate, has a model of an eternal Universe based upon General Relativity:
Wikipedia -- Conformal cyclic cosmology
Which does have some appeal, I admit.
Still, we *know* that quantum gravity effects will be relevant at some point, so this type of splicing together may not be as straightforward as it appears in just GR.
Without exception, every theorist that I have read, in popular, undergraduate (mostly) and graduate (a few) texts all agree that General Relativity is not the complete picture, and certainly not the final one.