Masks and vaccinations are recommended. Plan your visit
At this simple but ever-popular exhibit, black sand from nearby beaches make spiky patterns that reveal the invisible magnetic field between the poles of two giant magnets.
"Clouds" of iron particles dart and dance in a magnetic field.
Where: Gallery 2: Tinkering
Pier 15
(Embarcadero at Green Street)
San Francisco, CA 94111
415.528.4444
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