  We measure stretched exponential behavior, exp(- (t/t_0)**beta), over many
decades in a one-dimensional array of coupled chaotic electronic elements just
above a crisis-induced intermittency transition. There is strong spatial
heterogeneity and individual sites display a dynamics ranging from near power
law ($\beta=0$) to near exponential ($\beta=1$) while the global dynamics,
given by a spatial average, remains stretched exponential. These results can be
reproduced quantitatively with a one-dimensional coupled-map lattice and thus
appear to be system independent. In this model, local stretched exponential
dynamics is achieved without frozen disorder and is a fundamental property of
the coupled system. The heterogeneity of the experimental system can be
reproduced by introducing quenched disorder in the model. This suggests that
the stretched exponential dynamics can arise as a purely chaotic phenomenon.
