The nature of science and its ties to philosophy and history.
With philosophy we ask many questions of existence. Using science as one of the tools of philosophy we delve into the workings of our Universe trying to find answers to some of those questions. Specifically those answers dealing with the workings of the physical Universe. In searching for a better understanding how the Universe works we gain more knowledge of it. It is this knowledge that we use that gives us what we have today. Without Science we would not understand how electricity works. This in itself would make many things we have in the world unable to exist. Such things as cars, computers, lights, or TV. The miracle of this technology comes from our understanding of the laws of the Universe. With it we can cured diseases, save lives, and go into space. We could not do this without the scientists who have spent their lives in laboratories testing and researching.
However, even with the many wonders science gives us it also has a downside. Being human as we are we can miss use science. Science can just as easily lead to lives lost as lives saved. Sometimes this is unavoidable by accident, but sometimes people purposely miss use it. One need only look into our history to see some of these accidents and blatant missuses. Only through wisdom and vigilance can we prevent either.
There are many areas of science such as geology, biology, chemistry, and physics. Each of the fields in science are deep with many things to learn, people spend their entire lives focusing on one subject.