Its important to know the history of science because without any history we cannot understand main content of its formula or anything else that why we have to know the history of science
First of all i want to tell u that science involves both natural science and and social science
we all know that we are making many changes in the technology and developing it in our day to day life enormously
and we don't have any idea that when it might not work or stop working.hence it is really important to know how these things were developed

here the development of the technology or science over the years is called history of science

hence we need to know how they were made and we can easily solve the problems related to them in future