Pi in the Sky on Pi Day 3.14 by Meryl Ann Butler
Thursday, March 14, 2013, is the 25th anniversary of Pi Day.
Pi Day, (3.14) was founded by Exploratorium physicist and "Prince of Pi," Larry Shaw.
Pi Day founder Larry Shaw leads the Pi Procession by Exploratorium, used with permission
The Greek letter "pi" is the symbol used in mathematics to represent the ratio of the circumference of a circle to its diameter, which is a never-ending number, 3.14159265358979323846264 ...
The Greek letter, Pi by Public domain collage art by Meryl Ann Butler
This irrational holiday is celebrated every year on 3/14 at 1:59 pm (the first five values of pi).
Have Your Pi and Eat it Too
Exploratorium festivities will take place outdoors from 1:00 to 3:00 p.m. in the Pier 15 Plaza in San Francisco, CA, weather permitting, and are free and open to the public.
Exploratorium staff members celebrate Pi in all its forms by Exploratorium, used with permission
Exploratorium Pi Day tradition includes a delectable selection of edible pies available for participants to enjoy. This year's pies are made by the Exploratorium's brand new culinary partner Curiosity Catering, a collaboration between Chef Loretta Keller of COCO 500, and Bon Appetit Management Company.
Tossing pizza .pi., a traditional activity for the PI Day celebration by Exploratorium, used with permission
Festivities also include pizza pie tossing demonstrations by Joe Forte of Pasquale's Pizzeria (participants may practice their own tossing techniques.)
The Exploratorium will also be sharing pi-related activities, hosing a Pi Parade, and will ceremoniously install their new Pi Shrine into a fittingly circular site outside Pier 15, in addition to other interactive pi activities.
It is also Albert Einstein's birthday.
Young fans prepare for the Pi Procession. by Exploratorium, used with permission
Pi in the Sky
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