Another Pi Day has come and gone, and this one was a little extra special because it was the once-in-a-century date when, at 1:59:26 AM and PM the date was 3.1415926. People celebrated by baking and eating pi pies, posting pictures on Facebook of pi pies, and generally being gleefully punny. On Pi Day people often celebrate the world's favorite irrational number but, and I think this is a missed opportunity, we rarely talk about it past its significance as a homophone for a delicious dessert. I aim to rectify that here and now, so ready yourself for a big heaping slice of pi!