Reminds me of one of my Maths professors in college, Ben Freedman. He was a writer and an engineer until his son Michael started asking math questions that dad

Reminds me of one of my Maths professors in college, Ben Freedman. He was a writer and an engineer until his son Michael started asking math questions that dad couldn't answer. So he went back for his PhD in his 40s. Michael ultimately won a Fields Medal.