Ben Levi,
I am presuming then that you have no idea what goes on in a university. For someone to have a PhD in mathematics means that he studied mathematics at a PhD level and most likely got his masters in a math field as well. I doubt he did any science in college, especially not more than the average college educated person. If you’re not majoring in a science field, and especially if you’re going on for your masters or PhD, you’re not going to bog your schedule down with unrelated courses.