  We report foam coarsening studies which were performed in the International
Space Station (ISS) to suppress drainage due to gravity. Foams and bubbly
liquids with controlled liquid fractions $\phi$ between 15 and 50\% were
investigated to study the transition between bubble growth laws previously
reported near the dry limit $\phi \rightarrow 0$ and the dilute limit $\phi
\rightarrow 1$ (Ostwald ripening). We determined the coarsening rates; for the
driest foams and the bubbly liquids, they are in close agreement with
theoretical predictions. We observe a sharp cross-over between the respective
laws at a critical value $\phi^*$. At liquid fractions beyond this transition,
neighboring bubbles are no longer all in contact, like at a jamming transition.
Remarkably $\phi^*$ is significantly larger than the random close packing
volume fraction of the bubbles $\phi_{\text{rcp}}$ which was determined
independently. We attribute the differences between $\phi^*$ and
$\phi_{\text{rcp}}$ to a weakly adhesive bubble interaction that we have
studied in complementary ground-based experiments.
