Albert Einstein stars in my submission for "Theory," Illustration Friday.com's topic of the week. I thought this would be the hardest topic so far, but it wasn't really. Einstein lends himself well to cartoony art! I think I enjoyed drawing the chalkboard as much as anything. Those are actual equations from Einstein's notes, which I memorized to enhance my art :) Can art and math coexist in one brain? In this particular case, I guess so. I don't plan to make a habit of it, though.