Mathematician Carlos Castillo-Chavez says that pi is so important to math that using its simple, geometric definition denies its greater powers. “[Pi] brings you into the world of mathematics, which ...

Once a century, a very special day comes along. That day is today — 9/16/25. Pi Day (3/14) often comes with sweet treats; Square Root Day (4/4/16 or 5/5/25, for example) has a certain numerical rhyme.

Math lovers and pizza enthusiasts can unite today. It's Pi Day! Get ready to drool! Pi Day pies are taking over social media, and the world can't get enough. From Oprah to The Big Bang Theory, this ...

Forbes contributors publish independent expert analyses and insights. Luis E. Romero is an entrepreneur, author and speaker. The natural universe expresses itself mostly in curved shapes and motions, ...