Comments on the differing lifetimes of charmed hadrons

Theoretical explanations of the observed lifetime differences of weakly decaying charmed hadrons are briefly reviewed. It is argued that the previous uncertainties in determining the dominant dynamical origin of the D/sup +/-D/sup 0/ lifetime difference are resolved by the recent development of a consistent theory of two-body decays which constitute a large fraction of all nonleptonic D decays. Predictions on the lifetime hierarchy of charmed baryons are also presented