In a recent extension of their previous work on ProTα/H1, Galvanetto et al. worked out a physical model to predict mesoscale properties from the nanoscale dynamics . Using the Rouse model of polymer solutions they found that the protein chain reconfiguration dynamics in the dense phase can be quantitatively related to translational diffusion and condensate viscosity. All-atom MD simulations showed that the observed wide range of dynamic timescales is concomitant with a broad distribution of contact lifetimes between the amino acid residues, which in the mean-field polymer model give rise to differential friction experienced by the chains. Taken together, these results highlight that relatively basic physical principles, as included in the polymer model, can describe the behavior of biomolecular condensates reasonably well and can relate mesoscopic properties to nanoscale structural dynamics.