| A Brief History of Pi | Schedule of Events | 2010 Photos | Activities & Links | Pi in Second Life |
| Welcome to our 22nd annual Pi Day! Come help us celebrate the never-ending number Pi (3.14159…), as well as Einstein’s birthday. Founded at the Exploratorium by our own Prince of Pi, physicist Larry Shaw, Pi Day has become an international holiday, celebrated live and online all around the world. Come create Pi puns, participate in Pi-related antics—and have a slice of pie, all lovingly prepared by museum staff and friends. | ||