Flatworm basically lives in the sea, own an one build, center neurological, complex reproductive organ, one therein germinal layer and a body of double-faced semmetry. Group of 3 independent research undertakes keeping apart observation to having head flatworm, discover flatworm has very strong second birth function, but second birth forms new head and other body place. When flatworm head is excised, still can survive, and can absorb energy, because there is a kind to be called inside its body,this is " Neoblasts " dry cell. When the body some place is excised, these dry cells handle avalanche cut, begin to have new organization of second birth of discriminative sex ground. Cell of university of Yi of Nuo of American Yi benefit and Phil of development biology professor - button mark (Phil Newmark) says: "We are passed prevent a kind of action the gene at network element method, achieved this astonishing discovery.