  Using numerical simulations we investigate the space-time properties of a
system in which spirals emerge within coarsening domains, thus giving rise to
non-trivial internal dynamics. Initially proposed in the context of population
dynamics, the studied six-species model exhibits growing domains composed of
three species in a rock-paper-scissors relationship. Through the investigation
of different quantities, such as space-time correlations and the derived
characteristic length, autocorrelation, density of empty sites, and interface
width, we demonstrate that the non-trivial dynamics inside the domains affects
the coarsening process as well as the properties of the interfaces separating
different domains. Domain growth, aging, and interface fluctuations are shown
to be governed by exponents whose values differ from those expected in systems
with curvature driven coarsening.
