Numerical simulation of how superfluid turbulence forms during the strongly nonequilibrium kinetics of Bose-Einstein condensation governed by the Gross-Pitaevskii equation. The panels show the formation of well-structured topological defects from a structureless weakly turbulent state, and subsequent decay of the vortex tangle (i.e., superfluid turbulence) with increasing time from left to right. The state in the central panel is close to what Henn et al. observe in their experiment (adapted from Ref. ).