Exploratorium's Pi Day to honor 'mysterious' number

Retired Exploratorium experimental scientist Larry Shaw is credited with starting the museum’s annual Pi Day celebration. On March 14, the 22nd annual Pi Day will feature science, music and — of course — pies.

What is Pi Day? Pi Day has become many things. Before it became Pi Day, it started out as a discussion between myself and a mathematician friend of mine about the mysterious relationship that pi has between one dimension and the next.