Saturday is Pi Day, a national celebration of the mathematical concept, which is the ratio of a circle's circumference to its ...

What is Pi Day? Whether you love math or you're just into some good dessert, this Saturday should be a sweet treat for you.

Which brings us to a titillating quote by American engineer and author Paul J. Nahin: “If π weren’t around, there would be no round pies.” ...

Celebrate Pi Day and read all about how this number pops up across math and science on our special Pi Day page. It's Pi Day at the pizzeria, and orders are flying. In the chaos, you randomly toss a ...