What pray tell is a historian of science? Is it a title you made up? ;)
History of Science is a major field that stories … the history of science. It’s been a well regarded historical field for a hundred years.
Here is a link to the History of Science Society which is the major professional organization in the United States. You can read the journal Isis at any good academic library that still has funding. If you aren’t American you can check out the International Society for the History of Philosophy of Science.
Or there is always the allied fields History of Medicine, History of Technology, and Environmental History.
Most books in my field are amazingly dense doorstops but if you are interested in a particular subject perhaps i can recommend one.
Or you know, you could not suggest to an academic that their field is invalid even with a winky emoji.