Masks are required for all visitors 2+. Vaccines 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.
Where: Ray and Dagmar Dolby Atrium
"Clouds" of iron particles dart and dance in a magnetic field.
Where: Gallery 2: Tinkering
(Embarcadero at Green Street)
San Francisco, CA 94111
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