Happy Pi Day! You know, that über-cool holiday when math geeks from around the world (or at least from countries where the month precedes the day) gather to recite digits, gorge on pie, and fete that elusive number in all its irrational glory.
Here are our picks for Pi Day celebration:
1. Head over to San Francisco's Exploratorium in person or on Second Life for pi shrines and circumambulation starting at 1:59 (3.14159, get it?).