Today is apparently Pi Day a celebration of the mathematical ratio that man has been trying to unlock for millennia.
3.1415926535897932384626433832795028841971
Pi represents the number you get when you divide the distance around a circle (its circumference) by the distance across (the diameter). While there are many infinitely long numbers in maths, pi is the only one in which an infinitely simple idea - the circle - unfolds into an infinitely complex value. This paradox drives many people to distraction.
The most recent attempt, by a Japanese computer scientist in 2002, found 1.24 trillion digits of pi.
Coincidentally, Pi Day is also the birthday of Albert Einstein, who no doubt knew more than a little about pi.
To see more go to the BBC
