So far I understand that by reading the story of Second of Thunder by Ray Bardbury. It’s about time traveling to the Past the dinosaur era. To time traveling you have big responsibility a small mistake can cause unbalance of history “by killing a animal or insect which has lifeline it basically you kill mankind”. Eckels pays 10000 dollars to time travel to dinosaur era to hunt tyrannosaurus rax. With him to other Hunters name Travis and Lesperance. Their main objective to kill those animal which has no feature. But Eckels made a mistake he ran off the path which can change the history of mankind. Then they went back to the Future 2055, then after that, Eckels realized that he killed butterfly it changes the same of future present.