Pi -- or "π" as the ancient Greeks (and I guess scientists who scrawl equations on chalkboards in old movies) called it -- is some kind of wonder. It's constant. It has a trillion, zillion, ba-grillion decimals trailing into the unknowable. I suppose it should be obvious how important the ratio of the circumference of a circle to its diameter is when you're a comic fan. Have you ever tried drawing a circle? They are abundantly difficult to draw without using a template. So on this Pi Day, we implore you to consider where we'd be without the crazy number in all of its necessary-rounding glory. Without it, several dozen comic strip characters' heads would be squares, triangles, rectangles or other things that are not circles.