  It is proposed, that color-singlet gluon-clusters can be formed in hadrons as
a consequence of self-organized criticality (SOC) in systems of interacting
soft gluons, and that the properties of such spatiotemporal complexities can be
probed experimentally by examing inelastic diffractive scattering. Theoretical
arguments and experimental evidences supporting the proposed picture are
presented --- together with the result of a systematic analysis of the existing
data for inelastic diffractive scattering processes performed at different
incident energies, and/or by using different beam-particles. It is shown that
the size- and the lifetime-distributions of such gluon-clusters can be directly
extracted from the data, and the obtained results exhibit universal power-law
behaviors --- in accordance with the expected SOC-fingerprints.
