Proof of full COVID-19 vaccination is now required for all visitors ages 12+. Plan your visit
Pi Shrine
This circular piece of Exploratorium history has held pride of place in π Day festivities since 1988.
Where: Gallery 5: Outdoor Exhibits
Phenomena:
Numbers
Aliases:
Pi Marker
More to explore
Cutting Pi
It may be hard to cut pie into equal pieces, but in this Snack, you can cut string into pi pieces!
Pi Toss - Science Snack Activity
Asked to get an estimate for the famed mathematical constant pi (π), try the random tossing of toothpicks.
Related exhibits
Pi Has Your Number
Use a touchscreen to search for any number hidden in the first 3 million digits of pi.
