Proof of full COVID-19 vaccination is now required for all visitors ages
12+. Plan your visit
Look down into the chamber and you’ll see an ongoing cascade of thin white trails appearing and disappearing. These are cosmic ray tracks, created by high-energy subatomic particles from space.
Where: Crossroads: Getting Started
Powder inside a fluorescent tube makes invisible light visible.
Where: This exhibit is not currently on view.
See the chemical reactions taking place in an electrolytic cell, as electricity flowing through a tank of salt water and pH-indicating dye creates zones of acidic (yellow) and basic (blue) solutions.
(Embarcadero at Green Street)
San Francisco, CA 94111
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