  In this paper we propose that the accelerating expansion of the present
matter-dominated universe, as suggested by the recent distance measurements of
type Ia supernovae, is generated along with the evolution of space in extra
dimensions. The Einstein equations are first analyzed qualitatively and then
solved numerically, so as to exhibit explicitly these patterns of the
accelerating expansion in this scenario. A fine-tuning problem associated with
such a scenario is also described and discussed.
