From Spaceweather.com:

PREPARE FOR PI DAY: Tomorrow, March 14th (3.14) is pi day--so get ready to celebrate a most compelling and mysterious constant of Nature. Pi appears in equations describing the orbits of planets, the colors of auroras, the structure of DNA. It's part of the fabric of our Universe.

Humans have been struggling to calculate for thousands of years. Divide the circumference of a circle by its diameter; the ratio is . Sounds simple, but the devil is in the digits. While the value of is finite (a smidgen more than 3), the decimal number is infinitely long:

3.1415926535897932384626433832795
02884197169399375105820974944592307
81640628620899862803482534211706...more

Supercomputers have succeeded in calculating more than 200 billion digits and they're still crunching. The weirdest way to compute : throw needles at a table or frozen hot dogs on the floor. Party time!