From San Francisco to New York, in museums, universities, classrooms and in the privacy of one’s own home, (and of course on Second Life), people are celebrating Pi. It’s the 21st anniversary of the celebration of Pi Day, an international holiday born at San Francisco’s Exploratorium. The number is Pi, 3.1415926535…ad infinitum. It’s today’s date and the starting time, the number you get when you divide the circumference of a circle by its diameter, and it cannot be expressed as a fraction. It continues forever.
