Is History A Science?

Is history a science? Well in my opinion, I don't think that history is a science. Scientists all over the world use existing formulas to come up with new theories. History on the other hand, is mainly based on predictions and we cant be 100% sure that the history that is published today is absolutely true. Moreover, history and science do have somethings in common, for example, they both use previous events to help their predictions that will turn out as a new theory, or an alternate conclusion to a piece of history. However, even though they use similar ways to predict outcomes, i still believe that history is not a science.