How many 'Big Bangs' were there ?

Answer 1

we think that there was only one in our universe, but we also think that there are an infinite number of undetectable paralell universes which were in all likelyhood also started with big bangs.

Answer 2

"A bounded world, governed only by the laws of mechanics, will always pass through a state very close to its initial state. On the other hand, according to accepted experimental laws (if one attributes absolute validity to them, and if one is willing to press their consequences to the extreme), the universe tends toward a certain final state, from which it will never depart. In this final state, from which will be a kind of death, all bodies will be at rest at the same temperature.
"... the kinetic theories can extricate themselves from this contradiction. The world, according to them, tends at first toward a state where it remains for a long time without apparent change; and this is consistent with experience; but it does not remain that way forever; ... i t merely stays there for an enormously long time, a time which is longer the more numerous are the molecules. This state will not be the final death of the universe, but a sort of slumber, from which it will awake after millions of centuries.
"According to this theory, to see heat pass from a cold body to a warm one, it will not be necessary to have the acute vision, the intelligence, and the dexterity of Maxwell's demon; it will suffice to have a little patience."
-Heri Poincare 1889

This quote implies that if you wait long enough, however long that might be, eventually, purely by chance, every molecule, atom, etc., will find itself in a configuration exactly like a configuration it was once in before. Following from that, if you believe that the universe works like a machine, then with all things in place as they once were, the universe must proceed forward exactly as it did the last time, and time will repeat itself in an endless cycle (because the universe will keep coming to that same point and proceeding forward from it in exactly the same way forever). And if one of these repeating points was the big bang, then the universe has conceivably happened already countless times, and will continue to happen in the same way forever. Everything you've ever done, you are doomed (or blessed) to repeat it again forever. But there is one comfort, Nietzche (if i remember correctly) proved (how? I can't remember that.) that this time around is THE time, and you still have free will (sorry, fatalists).


But there are a few problems with this beautiful idea. 1st of all, as pointed out in the text, molecules don't act exactly like billiard balls. For one thing, there is a point where the murky world of quantum physics interacts with the visible world, and that interaction almost certainly means that the universe could not happen the same way twice, since according to quantum theory, things have certain statistical chances of acting a certain way but you can never predict which way. A counterargument to this is that you still don't know that all these seemingly random behaviors don't repeat in the same, seemingly random way every time.

The other thing is that the universe, it seems, is unbounded and infinite and expanding indefinetely. It seems as if there is no way back to the big bang, that time will not repeat itself and that this time around is the one and only time around.

You only live once, and so does the universe, it seems.

Answer 3

One, based on current observations.

The theory might allow for multiple Big Bang-Big Crunch cycles, but that would be very difficult to prove from observation.

The problem here is that time itself is consequence of the Big Bang, so that talking about "were" in the sense of conventional chronology is meaningless when considering events outside of the Big Bang expansion.

Answer 4

one per reality (i would say universe but in theory it would be possible to spawn another big bang but this would consume the universe around it, how exactly we dont know. The Large Hadron Collider for instance could spawn another, but we wouldnt know as we would be at the centre of the mistake).

also the big crunch theory to the best of my knowledge has been disproved as it would be shrinking by now which would have strange effects.

Answer 5

Maybe one maybe thousands according to string theory if our universe created by a collision of two parallel BRANES which provoked the big bang

Answer 6

Science doesn't know, but there are theories that countless other universe-creation events have occurred. Right now, we can only talk about the one that formed our universe because there's not a single shred of evidence to prove that others happened.

Answer 7

there were three bigbangs related to the origin of the life on earth... first was the creation of the first elements ;hydrogen and helium... the second bigbang was the creation of the minor elements and the formation of the solar system and the planets... the third Bigbang was the one called Nemesis Hypothesis (occurs every 26 million years), the same one which caused the death of the dinosaurs and the domination of mammals on Earth.

iv read it from a book my professor lend me.. 'life and planet earth'

Answer 8

The universe could easily have sputtered threw many quantum reciprocates until infinity occurred.If infinity does indeed exist it would be the constant soluble frequency.So then what exactly is infinity of?

Answer 9

Just the one.

Not only is there no evidence of any others, the theories that predict them also predict that they can't be observed. Thats not science - thats mythology.