In this study, we investigate a moving behavior of the network which is observed before an amoeba turns into 'fruiting bodies', namely it sporulates. More specifically, we observe how Physarum polycephalum behaves after a severe environmental change; exposure to certain strong light. Through systematic, controlled experiments (in constant dark condition, 26 • C) we obtained four evidences, suggesting an efficient mechanism of the network's moving by which Physarum polycephalum makes the

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... ion more effective, which is considered to be important for its survival. Our finding adds a new knowledge to the biological aspect of network science.