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.

Cut the sides of the small cup into four equal parts. Remove the base to create four curved pieces that will be the blades of the wind generator. Use hot glue to attach two craft sticks together at ...

What else can I do nearby? The Ferry Building features a wealth of shopping and dining choices as well as a farmers’ market several days a week. (You can also catch a ferry to many points in the Bay ...

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 ...

Here’s a cow’s eye from the meat company. The white part is the sclera, the outer covering of the eyeball. The blue is the cornea, which starts out clear but becomes cloudy after death. Step 2: ...

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You need to enable JavaScript to run the "Ron H: Age on Other Worlds" app.

Look through the free end of the tube, opposite the protractor, or sight along the tube’s top edge. Focus on something at eye level. Ask your partner to read the angle where the string crosses the ...

One of the most exciting exercises I ever did as a kid was to make a scale model of the Solar System. Most of the pictures in my books made the distance between planets seem small and easy to travel.

Try a new tilt on eclipses. Why doesn’t a solar or lunar eclipse happen every month? It’s because the moon’s orbit around the earth is tilted in relation to the earth’s orbit around the Sun. In this ...

Make three Roto-Copters for each person. Use a marker to draw a 1-foot circle on a piece of newspaper. Put a cereal bowl in the middle of the circle. The circle is the target area and the bowl is the ...

The pneumatic tire and the chain drive, followed by the development of gears, revolutionized bicycling in the later 1800s. In the last fifteen years, there has been a revolution of sorts in the ...