You can make sentences without words!
Grow spikes of crystals in the sun.
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.
A flash of light prints a lingering image in your eye.
Not all bubbles are made with soap!
This stuff can't make up its mind -- is it a liquid or a solid?
Discover secret colors hidden in a black marker!
Pick one and guess the source
Pier 15(Embarcadero at Green Street)San Francisco, CA 94111(415) 528-4444
© 2015 Exploratorium
Sign up for our newsletter