We investigate the dynamics of fracture in drying films of colloidal silica. Water loss quenches the nanoparticle
dispersionsto form a liquid-saturated elastic network of particlesthat relieves drying-induced strain by cracking. These
cracks display intriguing intermittent motion originating from the deformation of arrested crack tips and aging of the
elastic network. The dynamics of a single crack exhibits a universal evolution, described by a balance of the driving
elastic power with the sum of interfacial power and the viscous dissipation rate of flowing interstitial fluid.