http://en.wikipedia.org/wiki/Ultimate_fate_of_the_universeBig Bounce
Main article: Big Bounce
The Big Bounce is a theorized scientific model related to the beginning of the known Universe. It derives from the oscillatory universe or cyclic repetition interpretation of the Big Bang where the first cosmological event was the result of the collapse of a previous universe.
According to one version of the Big Bang theory of cosmology, in the beginning the universe had infinite density. Such a description seems to be at odds with everything else in physics, and especially quantum mechanics and its uncertainty principle.[citation needed] It is not surprising, therefore, that quantum mechanics has given rise to an alternative version of the Big Bang theory. Also, if the universe is closed, this theory would predict that once this universe collapses it will spawn another universe in an event similar to the Big Bang after a universal singularity is reached or a repulsive quantum force causes re-expansion.
Within this link are all hypothesis relating to the universe. All speculation.
Multiverse: no complete end
Main article: Multiverse
One multiverse hypothesis states that our uni-"verse" is merely one Big Bang among an infinite number of simultaneously expanding Big Bangs that are spread out over endless distances (open space).
Each "verse" may be either matter or antimatter, with an equal number in existence at any given time. As the "verses" expand they collide and matter and antimatter annihilate, releasing energy. Heat death of a finite universe would be predicted as entropy increases, however, the infinite size of the multiverse and the infinite number of "verses" could mean that new "verses" would be formed as old "verses" were annihilated.
A chain reaction multiverse would be analogous to a fireworks display (each explosion representing a Big Bang) that starts in one neighborhood and is followed by fireworks displays in surrounding neighborhoods and then in neighborhoods further out. The chain reaction of Big Bangs would continue to expand as Big Bang fuel is consumed. If the multiverse is open and the fuel is infinite then the chain reaction would expand forever. Of course, it is not known what the "fuel" is, but it is logical to assume that matter and energy are the product of a transformation from a real reactant, possibly the Higgs boson[citation needed].
Another infinite hypothesis.
Its pretty pathetic that you can't differentiate between a
hypothesis and a theory. I expect nothing more, however.
The concept of gravity is a theory -- testable.
The concept whether the universe is finite or infinite would be a hypothesis, and will remain as such until we derive a method to test such concepts.
\facepalm.
Google.com is your friend. Start using it. I suppose you won't be writing that book and claiming the nobel prize anymore. Oh well.