Divide any circle’s circumference by its diameter and you get pi. But what, exactly, are its digits? Measuring physical ...

You don’t just get π in circular motion. You get π in any oscillation. When a mass bobs on a spring, or a pendulum swings ...

Pi, a mathematical constant denoted by the Greek letter π, is the ratio of a circle's circumference C to its diameter d: π = C/d. The circumference of a circle is, in turn, equal to 2πr, where r is ...

This day only comes 'round' once every year!

From the value of π to its connection with March 14 and Archimedes’ contribution, take this quick quiz to see how much you ...

Good morning. I'm Rachel Martin. A Google employee in Japan has made history by calculating the value of the number pi to a new record - 31 trillion digits, just a smidge beyond the 3.14 that begins ...

Happy Tau Day, everyone! Every June 28, a rogue fleet of math nerds makes its case for the abolition of arguably the most important irrational number in the world: pi. These men and women of the "tau" ...

It’s Pi Day, and while we know that many of you celebrate privately, those that take a moment to put aside their ...