I was talking about multiple serial Big Bangs, the next one happening only after the products of the current Big Bang, to which our planet earth belongs, has disappeared.
Well, no you weren’t actually - you were originally referring to Lawrence Krauss’s speculation that the evidence that we currently see for the Big Bang, and in particular, the expansion of galaxies, will eventually disappear when the expansion has accelerated to the point where we can no longer see other galaxies. You mentioned 75 trillion years - I don’t know where you got that specific number from, but the hypothesis you were referring to then is specifically about evidence for the last Big Bang.
However I am happy to talk about serial universes too if you’d prefer.
I understand that some recent scientific theories that “don’t do proof” are claiming that maybe our Big Bang was not the first Big Bang, as many others have already claimed it won’t be the last. The scientists of the multiple serial Big Bang variety are agreed that the earliest we can expect the next Big Bang is in 10 billion years.
Yes, all this is correct, except for the last statement. The theory that the popular article below refers to does not propose that the cycle will be complete as soon as 10 billion years. The references to the relevant papers are:
Steihardt and Turok, *A Cyclic Model of the Univese, *Science 296, 1436 - 1439 (2002)
Steinhardt and Turok, *Cosmic Evolution in a Cyclic Universe, *arXiv:hep-th/0111098v2
Steinhardt and Turok, *Why the Cosmological Constant is Small and Positive, *Science 312, 1180-1183
In all cases they make it clear that the cycle takes trillions of years. (This is necessarily so as there has to be enough time for matter and radiation to be dissipated and black holes to evaporate)
Now I mentioned the state of human affairs in 75 TRILLION years - well past the date of the second or even fifth Big Bang from now, give or take a few Big Bangs and a few trillion years.
And I pointed out that it is meaningless to talk about human affairs in a million years from now, never mind a trillion or 76 trillion.
I hope you understand I wasn’t talking about this Big Bang at all. I WAS talking about a hypothetical new earth.
Well, not originally, but I am happy to talk about the hypothesis of a cyclic universe now, if you want.
So this is how I understand the scientific theories that don’t do proof (theories that keep changing at regular intervals, sometimes limited only by the imagination of the one bringing forth the theories):
First Cold Dark Nothing — Big Bang — Appear a Universe…Earth etc — Disappear universe…Earth etc — Cold Dark Nothing ---- Second Big Bang — Appear another universe…Earth etc — Disappear Earth etc — Cold Dark Nothing ---- Third Big Bang — and so on until eternity…
Yes this is more or less the Steinhardt-Turok hypothesis. Would you like to discuss it some more?
Alec
evolutionpages.com