For more than two millennia, mathematicians have produced a growing heap of pi equations in their ongoing search for methods to calculate pi faster and faster. The pile of equatio ...

This day only comes 'round' once every year!

Mountain Mike’s Pizza is celebrating Pi Day with a tasty equation: loyalty members who buy a medium pizza can add a one‑topping medium for $3.14.

Thursday marks Pi Day, otherwise known as 3.14, which marks the ratio of a circle's circumference to its diameter. While the average citizen can easily remember the 3.14 ratio, the exact ratio ...

Some numbers are useful. Some are famous. And then there is pi, a number so absurdly powerful that humanity has spent ...