If you stare at this dot, for few moments it disappears.
Can you make your palm squirm?
Can your eyes fool your nose? Find out with this experiment.
Tease your brain with five interactive illusions. You won't believe your eyes.
See how many colors you can make with only red, green, and blue bulbs.
Build your own spectroscope, a device to analyze the spectrum of light.
Interact with the Cafe Wall Illusion.
Why is the sky blue? That's a sticky question.
You can mix just three colors of light to make over 16 million different colors!
Four exhibits small enough to fit on postcards.
A flash of light prints a lingering image in your eye.
See colors that aren't really there.
ExploratoriumPier 15, San Francisco, CA 94111