Subject: will the universe stop expanding and begin to contract, and expand again?

the question of whether the universe will ever stop expanding is still up 
in the air (at least to my knowledge), but if it turns out that it will, i 
was wondering if it was possible that there is a continous cycle of 
expansion and contraction, and that there was not a singularity at the 
limit of the contraction, rather that the contraction accelerates the 
smaller the universe gets, and that the moment of infinite density is 
simply a point in the cycle.  perhaps the closer all the particles get, the 
faster they come together, and at some point the matter of the universe is 
indeed contained in a point, but that the particles dont stop there but 
speed past each other to continue the cycle in a phase of expansion, sort 
of like two cars going opposite directions on a looped track; at some 
point, they will meet, but they pass each other, and the distance between 
them increases to a certain point, until they begin to approach each other 
again.  since the particles never stop on their journies, but retain 
individual velocities (maybe), this would explain why the universe is 
uniform as a whole, but contains irregularities. the ways in which the 
particles move and the interactions between them would cause them to become 
grouped, but since their original configuration left them spaced throughout 
the universe, they would eventually have a similar distibution.

Re: will the universe stop expanding and begin to contract, and expand again?