Masks are required for all visitors 2+. Vaccines recommended. Plan your visit
When the disk is spun, the colors you see are illusions. This effect was popularized in 1894 by toymaker C. E. Benham, who called his spinning disk an “artificial spectrum top."
Where: Crossroads: Getting Started
Stare at a bird’s eye for 30 seconds, then look into the empty cage. You’ll see a ghostly bird—of a very different color—inside the cage
Where: Bechtel Gallery 3: Seeing & Reflections
Your brain adapts quickly to a warped view of the world, turning baskets into air balls.
Where: This exhibit is not currently on view.
(Embarcadero at Green Street)
San Francisco, CA 94111
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