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That's right, March 14 is international Pi Day. Get it -- pi is 3.14, and March 14 is 3/14?
Most everyone knows pi -- the ratio of the circumference of a circle to its diameter. But how much do you really know about this magical number? Below are 28 fun facts about pi split up into tidy categories. Enjoy!
[ MORE PI DAY: 10 Awesome ways to celebrate Pi Day 2013
EVEN MORE PI DAY: 10 More ways to celebrate Pi Day
FUN FACT: How Indiana tried to redefine pi ]
-Pi Day is also Albert Einstein's birthday, along with the birthdays of Apollo 8 Commander Frank Borman, Astronomer Giovanni Schiaparelli, and last-man-on-the-moon Gene Cernan.
-There is a pi cologne.*
-Computing pi is a stress test for a computer -- a kind of "digital cardiogram.*
-The record for calculating pi, as of 2010, is to 5 trillion digits (source: Gizmodo).
- If you were to print 1 billion decimal values...