Why is science a continuous study

Science is a continuous study because there are always new concepts and hypotheses to investigate.  Scientific study is a cycle that will continue until every question asked is answered. This is highly unlikely as the results of experiments based on observations and hypotheses lead to more questions, more observations, more experiments and more conclusions. This cycle just keeps on going, ad infinitum. I believe that scientists will never answer all the questions that can be asked. New subjects are being discovered as we speak. 

Abraham lincoln gave his 2nd inaugural address on march 4, 1865.-as lincoln prepared to speak, the civil war was drawing to a close.