Experience the Exploratorium. Let your curiosity roam free through hundreds of exhibits in our six spacious indoor and outdoor galleries at Pier 15, San Francisco.

Artist Bob Miller's Light Walk at the Exploratorium will change the way you look at light, shadow, and images.

At the Exploratorium, we’re passionate about curiosity-driven learning, science, and art. We create extraordinary exhibits, projects, programs, and events that ignite curiosity and cultivate the ...

What hours are you open?

It's all done with mirrors. Touching the spring seems easy, but the image of a spring is made by a big curved concave mirror. Light from a real spring bounces off the mirror to form the image you see.

Another popular system called a diagrammatic cipher, used by many children in school, substitutes symbols for letters instead of other letters. This system is, in essence, the same as the letter ...

It might seem obvious to say that earthquakes do most of their damage by shaking the ground. But groundshaking is actually a complex phenomenon. Engineering the seismic safety of a structure involves ...

Wispy lines show the path of tiny, high-energy particles generated by cosmic rays. Look down into the chamber and you’ll see an ongoing cascade of thin white trails appearing and disappearing. These ...

Visiting San Francisco? Bundle Exploratorium admission with 3 more top San Francisco attractions and save up to 46% with CityPass® tickets.

Completely fill two bottles with hot water. Keep filling until a meniscus (an upward bulge) forms on the surface of the water. Completely fill two bottles with cold water. Keep filling until a ...

In Navajo (Diné) tradition, the eclipse marks a sacred time. Solar eclipses are compelling astronomical events that connect us to the Sun and the Moon in powerful ways. Annular or total solar eclipses ...

How to Make a Pinhole Projector There are safe ways to view the sun. The simplest requires only a long box (at least six feet long), a piece of aluminum foil, a pin, and a sheet of white paper. The ...