it is most important to know history of science because if we know the history we can compare the todays science and old science like in old time there is prokaryotic and today's time Eukaryotic cells and if we don't know where the nucleus arive from and where the other thing arrived how can we find out the other things so it is very important to know the history of the science
Because it is the best way to understand the development of the scientific method, critical thought and the pitfalls of reasoning without logic.