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.

All year long we set aside Sunday mornings for Daytime members, donors, and Corporate members—10:00 a.m. to noon is just for you. Join us for a leisurely visit, enjoy lunch at the Tinkering Table ...

Eclipses can be mystifying experiences. Traditions from around the world imagine the eclipse as everything from the Sun being eaten by monsters to an intimate meeting with the moon. Here, we explore ...

Store up an electric charge, then make sparks. Tired of electrostatic experiments that just won’t work? This experiment will produce a spark that you can feel, see, and hear. Rub a foam plate with ...

Now we have great tools like spreadsheets to do the numerical computations for us. Below you can download OpenOffice (or Libre Office), Apple Numbers or Excel format files. In these spreadsheets, you ...

What should I wear? You'll want to wear comfortable clothes. We recommend layers, so that you're ready for whatever San Francisco weather comes your way—sun, fog, or a chilly ocean breeze. Comfortable ...

Fill in your weight below in the space indicated. You can enter your weight in any unit you wish. Click on the "Calculate" button. Notice that the weights on other worlds will automatically fill in.

What Are the Three Types of Solar Eclipses?

A total solar eclipse is perhaps nature's most awe-inspiring event—and the Exploratorium has been webcasting live eclipse coverage worldwide since 1998. Hungry for Science Let’s get cooking—Hungry for ...

Global Climate Change Explorer: Oceans and Water The Heart of Our Climate System Oceans are the heart of our planet’s weather and climate systems. Covering more than 70% of the Earth’s surface, oceans ...

The white stuff we know as sugar is sucrose, a molecule composed of 12 atoms of carbon, 22 atoms of hydrogen, and 11 atoms of oxygen (C12H22O11). Like all compounds made from these three elements, ...

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 ...