Assuming a cellular structure for the space-time, we propose a model i
n which the expansion of the universe is understood as a decrumpling p
rocess, much like the one we know from polymeric surfaces. The dimensi
on of space is then a real dynamical variable. The generalized Friedma
nn equation, derived from a Lagrangian, and the generalized equation o
f continuity for the matter content of the universe, give the dynamics
of our model universe. This leads to an oscillatory non-singular mode
l with two turning points for the dimension of space.