Since the pre-historic times，man has had an urge to satisfy his needs. Be it hunger ，shelter or search for a mate， he has always manipulated the circumstances to the best of his advantages. Probably this might be the reason why we human are the most developed of all living species on the earth ，and probably also in the universe. As we climbed the steps of evolution with giant leaps ，we somehow left behind common sense and logical thinking—we forgot that we have stopped thinking ahead of times.
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