Before revision: In wet-lab experiments \mbox{%DIFAUXCMD Nakagaki-Yamada-Toth,Tero-Takagi-etal , the slime mold Physarum polycephalum has demonstrated its ability to solve shortest path problems and to design efficient networks , see Figure \ref{Wet-Lab Experiments For the shortest path problem, a mathematical model for the evolution of the slime was proposed in \mbox{%DIFAUXCMD Tero-Kobayashi-Nakagaki .
After revision: In wet-lab experiments \mbox{%DIFAUXCMD Nakagaki-Yamada-Toth,Tero-Takagi-etal , the slime mold Physarum polycephalum has demonstrated its ability to solve shortest path problems and to design efficient networks , see Figure \ref{Wet-Lab Experiments For the shortest path problem, a mathematical model for the evolution of the slime is available and it has been shown in computer experiments and through mathematical analysis that the dynamics solves the shortest path problem .