Before the Big Bang, when our universe began to expand rapidly, it is possible that there was an earlier universe that took its place.
Sir Roger Penrose, a mathematician and physicist at Oxford University who recently won the Nobel Prize for his work on black holes, suggested that our universe was not the first to exist. Telegraph. And, he added, this will not be the last either.
“The Big Bang was not the beginning,” Penrose said, according to the source. “There was something before the Big Bang and that's what we will have in our future.” In Penrose's vision, a universe will continue to expand until all of its matter eventually decomposes. And then, in its place, a new one will begin.
“We have a universe that is constantly expanding and the whole mass is decomposing, and in this crazy theory, that distant future becomes the Big Bang of another eon,” he said, according to The Telegraph.
Proof of his idea is what Penrose calls “Hawking Points”: the remains of the black holes before the Big Bang that survived their own universes, but are now at the end of their lives. And leaking radiation as it fades into nothingness.
“So our Big Bang started with something that was the distant future of a previous eon, and there would have been similar black holes evaporating through the evaporation of Hawking,” Penrose added. They will produce these points in the sky, which I call Hawking Points.
The time scale for the complete evaporation of a black hole is huge, possibly longer than the age of our current universe, making it almost impossible to detect. However, Sir Roger believes that the “dead” black holes of previous universes or “zeons” are now observable. If true, Hawking's theories would prove to be correct.