Watch tiny blue, green, and white molds grow on leftover food.
Watch old pennies turn bright and shiny right before your eyes!
What does it take to block gamma radiation?
Here's how you can model the use of X rays for medical examinations with some sand and a piece of screen.
Study ultraviolet radiation from the sun and other sources using UV beads.
Build your own spectroscope, a device to analyze the spectrum of light.
Use a sheet of liquid crystal to learn about how infrared cameras work.
A flash of light prints a lingering image in your eye.
It's all done with mirrors!
Suspend a ball in a stream of air.
Try to balance a stick on the tip of your finger. Does it matter which end is up?
A rotating black-and-white disk produces the illusion of color.
Suspend an object in air by blowing down on it.
A bicycle wheel acts like a giant gyroscope.
Getting used to looking at one color can lead you to perceive an entirely different color.
To see or not to see.
ExploratoriumPier 15, San Francisco, CA 94111