IUPAC definition. polymerization: The process of converting a monomer or a mixture of monomers into a polymer. An example of alkene polymerization, in which each styrene monomer's double bond reforms as a single bond plus a bond to another styrene monomer.
There is evidence to indicate the Big Bang may have resulted from another, earlier universe collapsing in on itself, rather than from expanding from a point on infinitely hot and dense material. Instead, the universe appears to be going through constant phases of expansion (as it is at present) and contraction in a never-ending cycle. This theory of universe formation, known as the Big Bounce, was first proposed almost a century ago.
1) The origin of our universe occurred a finite number of years ago; 2) Its current expansion issues from a much smaller, hotter and denser state in the past; 3) Hydrogen, helium, deuterium and lithium were created from this primeval fireball; 4)The cosmic background radiation is the fireball light from this event. Only the big bang theory seems capable of explaining these 'cosmological' features. I think it will be a very long time before we find a better theory that doesn't look a lot like big bang cosmology.