Pi is an irrational number, and like some irrational people it just goes on and on. What is it with this crazy, crucial ...

WEST PALM BEACH, Fla. (AP) — Math enthusiasts around the world, from college students to rocket scientists, celebrate Pi Day, ...

After a foray into the art of pie-making, Abbey enjoys the opportunity to share lessons with others on Pi Day.

Every year the San Francisco museum that coined the holiday organizes events, including a parade around a circular plaque, called the Pi Shrine, 3.14 times — and then, of course, festivities ...