Following the guidance of the mayor of San Francisco and local health officials, the Exploratorium is postponing or canceling all public events through the end of March. Our galleries remain open to the public during our regular hours, Tuesday-Sunday, 10 a.m.-5 p.m., and for adults 18+ on Thursday nights from 6-10 p.m.
Welcome to our 33rd annual ? Day! Help us celebrate this never-ending number (3.14159 . . .) and Einstein's birthday as well. On Saturday, March 14, 2020, visit us for Pi (?) Day, participate in ?-related activities, and enjoy a piece of pie.
Founded at the Exploratorium by our own Prince of ?, physicist Larry Shaw, ? Day has become an international holiday, celebrated live and online all around the world.
Be sure to share your ? Day spirit with #PiDaySF and @Exploratorium.
Schedule of Events
? Activities with the Explainers
10:00 a.m.-4:30 p.m.
Bechtel Gallery 3
Join the Explainers for an exploration of ? and add to the ongoing ? bead string!
Sync on a Circle
With Cinema Arts
10:00 a.m.-5:00 p.m. | Bechtel Gallery 3
Sync by Max Hattler (2011, 9 min., looping)
Much like ?, Sync "is based on the idea that there is an underlying, unchanging synchronization at the center of everything; a sync that was decided at the very beginning of time. Everything follows from it, everything is ruled by it: all time, all physics, all life. And all animation."
Nanojems:® Million Digits of ?
10:00 a.m.-5:00 p.m.
Gallery 4 Corridor, Microscope Imaging Station
Look through the microscope to see the first million digits of ? engraved on crystal and sapphire gems.
11:00 a.m.-1:59 p.m. | Bechtel Gallery 3
Circles surround us in nature. To describe them, we use the number ?, or the ratio of a circle's circumference to its diameter: 3.14159.... Join the Explorables team to approximate this elusive number by tossing toothpicks onto a lined surface--and counting how many fall across the lines.
V-I-Pi Donor Lounge
11:00 a.m.-2:00 p.m. | Fisher Bay Observatory Gallery 6
Innovator-level donors and above are invited to bring their family and friends to the V-I-Pi donor lounge! The lounge will include complimentary beverages and snacks, a safe space to leave bags and coats, a relaxing place for the whole family to take a break, and a V-I-Pi pizza and pie bar at 12:30 p.m. RSVPs appreciated. Questions? Email [email protected]
With Ron Hipschman, Lori Lambertson, and Paul Dancstep
Noon | Bechtel Gallery 3, Wattis Webcast Studio
Find out what's so special about the famous mathematical constant. Exploratorium educators and ? enthusiasts Lori Lambertson, Ron Hipschman, and Paul Dancstep will share the history and demonstrate the unique properties of this irrational number.
Science of Pi(e)
With Julie Yu
1:00 p.m. | Bechtel Gallery 3, Wattis Webcast Studio
Whether your appetite is for pizza or pumpkin, there's a full serving of science and a slice of math that goes into a pie before it enters the oven. How do you get from a ball of dough to a crusty disc of deliciousness? Get ready for some kitchen calculations and discover how ? can help you to a better pie.
With Mission Delirium
1:59 p.m. | Gallery 4
Celebrate circumference and circumambulate the ? shrine in our annual parade. Find your (decimal) place in the neverending line of digits to secure your own slice of pie!
2:15 p.m. | Gallery 5
Have a slice of pie on us--while quantities last. First come, first served. One slice per person, please.