re: Hardest and most interesting class you took in college

Hardest was probably Fluid Dynamics (Mechanical Engineering). Mixture of difficult subject matter and an awful professor so a lot of self teaching.

Most interesting was American History-American Revolution to Civil War. I believe the professor's name was Paskoff. Was prior to history podcasts, but he had that type of way with the subject matter. When he told the story, he made it super interesting. Never got bored in that class.