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.

Substitution ciphers and decoder rings We use substitution ciphers all the time. (Actually, substitution ciphers could properly be called codes in most cases.) Morse code, shorthand, semaphore, and ...

Middle Ground, allows people to drop their guard for a bit, enjoy the presence of others, and learn something new. Fifteen interactive exhibits, a coffee cart, and chairs and tables create a space for ...

Fill in your birthdate below in the space indicated. (Note you must enter the year as a 4-digit number!) Click on the "Calculate" button. Notice that your age on other worlds will automatically fill ...

This simple paper toy spins through the air like a mini-helicopter ...

Answers to questions about COVID safety, planning your visit, accessibility, food and more at the Exploratorium's beautiful bayside location at Pier 15, San Francisco.

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 ...

When you add sugar to water, the sugar crystals dissolve and the sugar goes into solution. But you can’t dissolve an infinite amount of sugar into a fixed volume of water. When as much sugar has been ...

The bicycle is a tremendously efficient means of transportation. In fact cycling is more efficient than any other method of travel--including walking! The one billion bicycles in the world are a ...

From Chinese baozi to Armenian lavash, bread comes in thousands of forms. What do they have in common? On the most basic level, they all involve cooking a mixture of milled grains and water.

A solar eclipse happens when the moon passes between the Sun and Earth, casting a shadow on Earth that either fully or partially blocks the Sun's light in some areas.

Check out our cinema arts, evening, member, and other upcoming and ongoing events.