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Make a crowd-pleasing noisemaker called a sound sandwich, which you can adjust to raise or lower its pitch.
Build a stripped-down motor, a simple, easy-to-make version of the electric motors found in toys, tools, and appliances.
Does the sun rise in the east? Not exactly.
How do scientists establish the age of artifacts, rocks, and settlements?
Learn to count like the Maya by studying one of their ancient stone documents.
Did you know the Maya used two calendars? How did they know when to plan their big New Year's parties?
Why is your shadow longer in winter than in summer? Grab a basketball and some paperclips and find out!
Try your hand at explaining symbols both modern and ancient, and then make your own.
See for yourself how the tilt of the earth's axis results in what we experience as the seasons.
Stand outside on a sunny day with a watch in your hand, and you can tell which way is north.
Make a spinning disc called a stroboscope, which lets you create your own animated cartoon.
Staff member Vivian Altmann presents the "Snack" Water-Bottle Membranophone." Make some noise with simple materials.
The more astronomy changes, the more it stays the same. This series of images juxtaposes ancient and modern study of the celestial bodies.
A trash-filled median blossoms into a community oasis.
Learn how grafting, hybridizing, and transgenics have transformed cultivation.
Find out what all that fiddling around before a concert is really about.
Stepping is rhythmic movement that uses the body as an instrument.
Peter Whitehead is an instrument builder, performer, and composer.
Our reactions may be trained, but the devices that make music sound "sad" are real enough.
Most people abhor the sound of their own recorded voice. So what are these recording devices doing to our voices to make them sound so awful?
Why do I hear the bass from my neighbor's stereo, but not the treble?
Why do some songs get stuck in your head?
Opera singers carry notes that seem to last forever. How do they do it?
Sit down for compost tea with a visionary cultivator.
Explore the deadly beautiful world of carnivorous plants.
Find out why biodiversity benefits plants and people alike.
See why these beautiful flowers have attracted generations of admirers.
Take a peek at the colorful world of plant sex.
Discover the uncommon stories behind the most common fruits and vegetables.
The fact and fiction behind some bizarre gardening remedies.
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San Francisco, CA 94111
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