Science changes he future as-
.All new technology that is formed is all because of science ,so many times these technology help us as -mobiles ,computers, machines ,washing machine ,cars etc. all are because of science and they are very important for us ,in the past these things were not available so the lives were quite difficult but after many years all things that are needed are there so they changed our present ,so in future when more new technologies would be invented it will change our future. And sometimes it also effect us like in the past there were less or no factories so there was no pollution but after some years there are so many factories and they also effect our future.
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Positive : makes man life easy at present and intresting about past research .
negative : makes a man lazy and maybe further development of machines may rule us