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On March 14th at 1:59pm help the San Francisco exploratorium celebrate this never ending number (3.14159...) and Einstein's birthday as well, by joining in on a free slice of "Pie" and other "Pi" related activities! If you can't join in person, watch a webcast on explo.tv
Founded at the Exploratorium by our own SF Prince of Pi, physicist Larry Shaw, Pi Day has become an international holiday, celebrated live and online all around the world.
